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* v4.4-16.09-android-tmp:
unsafe_[get|put]_user: change interface to use a error target label
usercopy: remove page-spanning test for now
usercopy: fix overlap check for kernel text
mm/slub: support left redzone
Linux 4.4.21
lib/mpi: mpi_write_sgl(): fix skipping of leading zero limbs
regulator: anatop: allow regulator to be in bypass mode
hwrng: exynos - Disable runtime PM on probe failure
cpufreq: Fix GOV_LIMITS handling for the userspace governor
metag: Fix atomic_*_return inline asm constraints
scsi: fix upper bounds check of sense key in scsi_sense_key_string()
ALSA: timer: fix NULL pointer dereference on memory allocation failure
ALSA: timer: fix division by zero after SNDRV_TIMER_IOCTL_CONTINUE
ALSA: timer: fix NULL pointer dereference in read()/ioctl() race
ALSA: hda - Enable subwoofer on Dell Inspiron 7559
ALSA: hda - Add headset mic quirk for Dell Inspiron 5468
ALSA: rawmidi: Fix possible deadlock with virmidi registration
ALSA: fireworks: accessing to user space outside spinlock
ALSA: firewire-tascam: accessing to user space outside spinlock
ALSA: usb-audio: Add sample rate inquiry quirk for B850V3 CP2114
crypto: caam - fix IV loading for authenc (giv)decryption
uprobes: Fix the memcg accounting
x86/apic: Do not init irq remapping if ioapic is disabled
vhost/scsi: fix reuse of &vq->iov[out] in response
bcache: RESERVE_PRIO is too small by one when prio_buckets() is a power of two.
ubifs: Fix assertion in layout_in_gaps()
ovl: fix workdir creation
ovl: listxattr: use strnlen()
ovl: remove posix_acl_default from workdir
ovl: don't copy up opaqueness
wrappers for ->i_mutex access
lustre: remove unused declaration
timekeeping: Avoid taking lock in NMI path with CONFIG_DEBUG_TIMEKEEPING
timekeeping: Cap array access in timekeeping_debug
xfs: fix superblock inprogress check
ASoC: atmel_ssc_dai: Don't unconditionally reset SSC on stream startup
drm/msm: fix use of copy_from_user() while holding spinlock
drm: Reject page_flip for !DRIVER_MODESET
drm/radeon: fix radeon_move_blit on 32bit systems
s390/sclp_ctl: fix potential information leak with /dev/sclp
rds: fix an infoleak in rds_inc_info_copy
powerpc/tm: Avoid SLB faults in treclaim/trecheckpoint when RI=0
nvme: Call pci_disable_device on the error path.
cgroup: reduce read locked section of cgroup_threadgroup_rwsem during fork
block: make sure a big bio is split into at most 256 bvecs
block: Fix race triggered by blk_set_queue_dying()
ext4: avoid modifying checksum fields directly during checksum verification
ext4: avoid deadlock when expanding inode size
ext4: properly align shifted xattrs when expanding inodes
ext4: fix xattr shifting when expanding inodes part 2
ext4: fix xattr shifting when expanding inodes
ext4: validate that metadata blocks do not overlap superblock
net: Use ns_capable_noaudit() when determining net sysctl permissions
kernel: Add noaudit variant of ns_capable()
KEYS: Fix ASN.1 indefinite length object parsing
drivers:hv: Lock access to hyperv_mmio resource tree
cxlflash: Move to exponential back-off when cmd_room is not available
netfilter: x_tables: check for size overflow
drm/amdgpu/cz: enable/disable vce dpm even if vce pg is disabled
cred: Reject inodes with invalid ids in set_create_file_as()
fs: Check for invalid i_uid in may_follow_link()
IB/IPoIB: Do not set skb truesize since using one linearskb
udp: properly support MSG_PEEK with truncated buffers
crypto: nx-842 - Mask XERS0 bit in return value
cxlflash: Fix to avoid virtual LUN failover failure
cxlflash: Fix to escalate LINK_RESET also on port 1
tipc: fix nl compat regression for link statistics
tipc: fix an infoleak in tipc_nl_compat_link_dump
netfilter: x_tables: check for size overflow
Bluetooth: Add support for Intel Bluetooth device 8265 [8087:0a2b]
drm/i915: Check VBT for port presence in addition to the strap on VLV/CHV
drm/i915: Only ignore eDP ports that are connected
Input: xpad - move pending clear to the correct location
net: thunderx: Fix link status reporting
x86/hyperv: Avoid reporting bogus NMI status for Gen2 instances
crypto: vmx - IV size failing on skcipher API
tda10071: Fix dependency to REGMAP_I2C
crypto: vmx - Fix ABI detection
crypto: vmx - comply with ABIs that specify vrsave as reserved.
HID: core: prevent out-of-bound readings
lpfc: Fix DMA faults observed upon plugging loopback connector
block: fix blk_rq_get_max_sectors for driver private requests
irqchip/gicv3-its: numa: Enable workaround for Cavium thunderx erratum 23144
clocksource: Allow unregistering the watchdog
btrfs: Continue write in case of can_not_nocow
blk-mq: End unstarted requests on dying queue
cxlflash: Fix to resolve dead-lock during EEH recovery
drm/radeon/mst: fix regression in lane/link handling.
ecryptfs: fix handling of directory opening
ALSA: hda: add AMD Polaris-10/11 AZ PCI IDs with proper driver caps
drm: Balance error path for GEM handle allocation
ntp: Fix ADJ_SETOFFSET being used w/ ADJ_NANO
time: Verify time values in adjtimex ADJ_SETOFFSET to avoid overflow
Input: xpad - correctly handle concurrent LED and FF requests
net: thunderx: Fix receive packet stats
net: thunderx: Fix for multiqset not configured upon interface toggle
perf/x86/cqm: Fix CQM memory leak and notifier leak
perf/x86/cqm: Fix CQM handling of grouping events into a cache_group
s390/crypto: provide correct file mode at device register.
proc: revert /proc/<pid>/maps [stack:TID] annotation
intel_idle: Support for Intel Xeon Phi Processor x200 Product Family
cxlflash: Fix to avoid unnecessary scan with internal LUNs
Drivers: hv: vmbus: don't manipulate with clocksources on crash
Drivers: hv: vmbus: avoid scheduling in interrupt context in vmbus_initiate_unload()
Drivers: hv: vmbus: avoid infinite loop in init_vp_index()
arcmsr: fixes not release allocated resource
arcmsr: fixed getting wrong configuration data
s390/pci_dma: fix DMA table corruption with > 4 TB main memory
net/mlx5e: Don't modify CQ before it was created
net/mlx5e: Don't try to modify CQ moderation if it is not supported
mmc: sdhci: Do not BUG on invalid vdd
UVC: Add support for R200 depth camera
sched/numa: Fix use-after-free bug in the task_numa_compare
ALSA: hda - add codec support for Kabylake display audio codec
drm/i915: Fix hpd live status bits for g4x
tipc: fix nullptr crash during subscription cancel
arm64: Add workaround for Cavium erratum 27456
net: thunderx: Fix for Qset error due to CQ full
drm/radeon: fix dp link rate selection (v2)
drm/amdgpu: fix dp link rate selection (v2)
qla2xxx: Use ATIO type to send correct tmr response
mmc: sdhci: 64-bit DMA actually has 4-byte alignment
drm/atomic: Do not unset crtc when an encoder is stolen
drm/i915/skl: Add missing SKL ids
drm/i915/bxt: update list of PCIIDs
hrtimer: Catch illegal clockids
i40e/i40evf: Fix RSS rx-flow-hash configuration through ethtool
mpt3sas: Fix for Asynchronous completion of timedout IO and task abort of timedout IO.
mpt3sas: A correction in unmap_resources
net: cavium: liquidio: fix check for in progress flag
arm64: KVM: Configure TCR_EL2.PS at runtime
irqchip/gic-v3: Make sure read from ICC_IAR1_EL1 is visible on redestributor
pwm: lpc32xx: fix and simplify duty cycle and period calculations
pwm: lpc32xx: correct number of PWM channels from 2 to 1
pwm: fsl-ftm: Fix clock enable/disable when using PM
megaraid_sas: Add an i/o barrier
megaraid_sas: Fix SMAP issue
megaraid_sas: Do not allow PCI access during OCR
s390/cio: update measurement characteristics
s390/cio: ensure consistent measurement state
s390/cio: fix measurement characteristics memleak
qeth: initialize net_device with carrier off
lpfc: Fix external loopback failure.
lpfc: Fix mbox reuse in PLOGI completion
lpfc: Fix RDP Speed reporting.
lpfc: Fix crash in fcp command completion path.
lpfc: Fix driver crash when module parameter lpfc_fcp_io_channel set to 16
lpfc: Fix RegLogin failed error seen on Lancer FC during port bounce
lpfc: Fix the FLOGI discovery logic to comply with T11 standards
lpfc: Fix FCF Infinite loop in lpfc_sli4_fcf_rr_next_index_get.
cxl: Enable PCI device ID for future IBM CXL adapter
cxl: fix build for GCC 4.6.x
cxlflash: Enable device id for future IBM CXL adapter
cxlflash: Resolve oops in wait_port_offline
cxlflash: Fix to resolve cmd leak after host reset
cxl: Fix DSI misses when the context owning task exits
cxl: Fix possible idr warning when contexts are released
Drivers: hv: vmbus: fix rescind-offer handling for device without a driver
Drivers: hv: vmbus: serialize process_chn_event() and vmbus_close_internal()
Drivers: hv: vss: run only on supported host versions
drivers/hv: cleanup synic msrs if vmbus connect failed
Drivers: hv: util: catch allocation errors
tools: hv: report ENOSPC errors in hv_fcopy_daemon
Drivers: hv: utils: run polling callback always in interrupt context
Drivers: hv: util: Increase the timeout for util services
lightnvm: fix missing grown bad block type
lightnvm: fix locking and mempool in rrpc_lun_gc
lightnvm: unlock rq and free ppa_list on submission fail
lightnvm: add check after mempool allocation
lightnvm: fix incorrect nr_free_blocks stat
lightnvm: fix bio submission issue
cxlflash: a couple off by one bugs
fm10k: Cleanup exception handling for mailbox interrupt
fm10k: Cleanup MSI-X interrupts in case of failure
fm10k: reinitialize queuing scheme after calling init_hw
fm10k: always check init_hw for errors
fm10k: reset max_queues on init_hw_vf failure
fm10k: Fix handling of NAPI budget when multiple queues are enabled per vector
fm10k: Correct MTU for jumbo frames
fm10k: do not assume VF always has 1 queue
clk: xgene: Fix divider with non-zero shift value
e1000e: fix division by zero on jumbo MTUs
e1000: fix data race between tx_ring->next_to_clean
ixgbe: Fix handling of NAPI budget when multiple queues are enabled per vector
igb: fix NULL derefs due to skipped SR-IOV enabling
igb: use the correct i210 register for EEMNGCTL
igb: don't unmap NULL hw_addr
i40e: Fix Rx hash reported to the stack by our driver
i40e: clean whole mac filter list
i40evf: check rings before freeing resources
i40e: don't add zero MAC filter
i40e: properly delete VF MAC filters
i40e: Fix memory leaks, sideband filter programming
i40e: fix: do not sleep in netdev_ops
i40e/i40evf: Fix RS bit update in Tx path and disable force WB workaround
i40evf: handle many MAC filters correctly
i40e: Workaround fix for mss < 256 issue
UPSTREAM: audit: fix a double fetch in audit_log_single_execve_arg()
UPSTREAM: ARM: 8494/1: mm: Enable PXN when running non-LPAE kernel on LPAE processor
FIXUP: sched/tune: update accouting before CPU capacity
FIXUP: sched/tune: add fixes missing from a previous patch
arm: Fix #if/#ifdef typo in topology.c
arm: Fix build error "conflicting types for 'scale_cpu_capacity'"
sched/walt: use do_div instead of division operator
DEBUG: cpufreq: fix cpu_capacity tracing build for non-smp systems
sched/walt: include missing header for arm_timer_read_counter()
cpufreq: Kconfig: Fixup incorrect selection by CPU_FREQ_DEFAULT_GOV_SCHED
sched/fair: Avoid redundant idle_cpu() call in update_sg_lb_stats()
FIXUP: sched: scheduler-driven cpu frequency selection
sched/rt: Add Kconfig option to enable panicking for RT throttling
sched/rt: print RT tasks when RT throttling is activated
UPSTREAM: sched: Fix a race between __kthread_bind() and sched_setaffinity()
sched/fair: Favor higher cpus only for boosted tasks
vmstat: make vmstat_updater deferrable again and shut down on idle
sched/fair: call OPP update when going idle after migration
sched/cpufreq_sched: fix thermal capping events
sched/fair: Picking cpus with low OPPs for tasks that prefer idle CPUs
FIXUP: sched/tune: do initialization as a postcore_initicall
DEBUG: sched: add tracepoint for RD overutilized
sched/tune: Introducing a new schedtune attribute prefer_idle
sched: use util instead of capacity to select busy cpu
arch_timer: add error handling when the MPM global timer is cleared
FIXUP: sched: Fix double-release of spinlock in move_queued_task
FIXUP: sched/fair: Fix hang during suspend in sched_group_energy
FIXUP: sched: fix SchedFreq integration for both PELT and WALT
sched: EAS: Avoid causing spikes to max-freq unnecessarily
FIXUP: sched: fix set_cfs_cpu_capacity when WALT is in use
sched/walt: Accounting for number of irqs pending on each core
sched: Introduce Window Assisted Load Tracking (WALT)
sched/tune: fix PB and PC cuts indexes definition
sched/fair: optimize idle cpu selection for boosted tasks
FIXUP: sched/tune: fix accounting for runnable tasks
sched/tune: use a single initialisation function
sched/{fair,tune}: simplify fair.c code
FIXUP: sched/tune: fix payoff calculation for boost region
sched/tune: Add support for negative boost values
FIX: sched/tune: move schedtune_nornalize_energy into fair.c
FIX: sched/tune: update usage of boosted task utilisation on CPU selection
sched/fair: add tunable to set initial task load
sched/fair: add tunable to force selection at cpu granularity
sched: EAS: take cstate into account when selecting idle core
sched/cpufreq_sched: Consolidated update
FIXUP: sched: fix build for non-SMP target
DEBUG: sched/tune: add tracepoint on P-E space filtering
DEBUG: sched/tune: add tracepoint for energy_diff() values
DEBUG: sched/tune: add tracepoint for task boost signal
arm: topology: Define TC2 energy and provide it to the scheduler
CHROMIUM: sched: update the average of nr_running
DEBUG: schedtune: add tracepoint for schedtune_tasks_update() values
DEBUG: schedtune: add tracepoint for CPU boost signal
DEBUG: schedtune: add tracepoint for SchedTune configuration update
DEBUG: sched: add energy procfs interface
DEBUG: sched,cpufreq: add cpu_capacity change tracepoint
DEBUG: sched: add tracepoint for CPU load/util signals
DEBUG: sched: add tracepoint for task load/util signals
DEBUG: sched: add tracepoint for cpu/freq scale invariance
sched/fair: filter energy_diff() based on energy_payoff value
sched/tune: add support to compute normalized energy
sched/fair: keep track of energy/capacity variations
sched/fair: add boosted task utilization
sched/{fair,tune}: track RUNNABLE tasks impact on per CPU boost value
sched/tune: compute and keep track of per CPU boost value
sched/tune: add initial support for CGroups based boosting
sched/fair: add boosted CPU usage
sched/fair: add function to convert boost value into "margin"
sched/tune: add sysctl interface to define a boost value
sched/tune: add detailed documentation
fixup! sched/fair: jump to max OPP when crossing UP threshold
fixup! sched: scheduler-driven cpu frequency selection
sched: rt scheduler sets capacity requirement
sched: deadline: use deadline bandwidth in scale_rt_capacity
sched: remove call of sched_avg_update from sched_rt_avg_update
sched/cpufreq_sched: add trace events
sched/fair: jump to max OPP when crossing UP threshold
sched/fair: cpufreq_sched triggers for load balancing
sched/{core,fair}: trigger OPP change request on fork()
sched/fair: add triggers for OPP change requests
sched: scheduler-driven cpu frequency selection
cpufreq: introduce cpufreq_driver_is_slow
sched: Consider misfit tasks when load-balancing
sched: Add group_misfit_task load-balance type
sched: Add per-cpu max capacity to sched_group_capacity
sched: Do eas idle balance regardless of the rq avg idle value
arm64: Enable max freq invariant scheduler load-tracking and capacity support
arm: Enable max freq invariant scheduler load-tracking and capacity support
sched: Update max cpu capacity in case of max frequency constraints
cpufreq: Max freq invariant scheduler load-tracking and cpu capacity support
arm64, topology: Updates to use DT bindings for EAS costing data
sched: Support for extracting EAS energy costs from DT
Documentation: DT bindings for energy model cost data required by EAS
sched: Disable energy-unfriendly nohz kicks
sched: Consider a not over-utilized energy-aware system as balanced
sched: Energy-aware wake-up task placement
sched: Determine the current sched_group idle-state
sched, cpuidle: Track cpuidle state index in the scheduler
sched: Add over-utilization/tipping point indicator
sched: Estimate energy impact of scheduling decisions
sched: Extend sched_group_energy to test load-balancing decisions
sched: Calculate energy consumption of sched_group
sched: Highest energy aware balancing sched_domain level pointer
sched: Relocated cpu_util() and change return type
sched: Compute cpu capacity available at current frequency
arm64: Cpu invariant scheduler load-tracking and capacity support
arm: Cpu invariant scheduler load-tracking and capacity support
sched: Introduce SD_SHARE_CAP_STATES sched_domain flag
sched: Initialize energy data structures
sched: Introduce energy data structures
sched: Make energy awareness a sched feature
sched: Documentation for scheduler energy cost model
sched: Prevent unnecessary active balance of single task in sched group
sched: Enable idle balance to pull single task towards cpu with higher capacity
sched: Consider spare cpu capacity at task wake-up
sched: Add cpu capacity awareness to wakeup balancing
sched: Store system-wide maximum cpu capacity in root domain
arm: Update arch_scale_cpu_capacity() to reflect change to define
arm64: Enable frequency invariant scheduler load-tracking support
arm: Enable frequency invariant scheduler load-tracking support
cpufreq: Frequency invariant scheduler load-tracking support
sched/fair: Fix new task's load avg removed from source CPU in wake_up_new_task()
FROMLIST: pstore: drop pmsg bounce buffer
UPSTREAM: usercopy: remove page-spanning test for now
UPSTREAM: usercopy: force check_object_size() inline
BACKPORT: usercopy: fold builtin_const check into inline function
UPSTREAM: x86/uaccess: force copy_*_user() to be inlined
UPSTREAM: HID: core: prevent out-of-bound readings
Android: Fix build breakages.
UPSTREAM: tty: Prevent ldisc drivers from re-using stale tty fields
UPSTREAM: netfilter: nfnetlink: correctly validate length of batch messages
cpuset: Make cpusets restore on hotplug
UPSTREAM: mm/slub: support left redzone
UPSTREAM: Make the hardened user-copy code depend on having a hardened allocator
Android: MMC/UFS IO Latency Histograms.
UPSTREAM: usercopy: fix overlap check for kernel text
UPSTREAM: usercopy: avoid potentially undefined behavior in pointer math
UPSTREAM: unsafe_[get|put]_user: change interface to use a error target label
BACKPORT: arm64: mm: fix location of _etext
BACKPORT: ARM: 8583/1: mm: fix location of _etext
BACKPORT: Don't show empty tag stats for unprivileged uids
UPSTREAM: tcp: fix use after free in tcp_xmit_retransmit_queue()
ANDROID: base-cfg: drop SECCOMP_FILTER config
UPSTREAM: [media] xc2028: unlock on error in xc2028_set_config()
UPSTREAM: [media] xc2028: avoid use after free
ANDROID: base-cfg: enable SECCOMP config
ANDROID: rcu_sync: Export rcu_sync_lockdep_assert
RFC: FROMLIST: cgroup: reduce read locked section of cgroup_threadgroup_rwsem during fork
RFC: FROMLIST: cgroup: avoid synchronize_sched() in __cgroup_procs_write()
RFC: FROMLIST: locking/percpu-rwsem: Optimize readers and reduce global impact
net: ipv6: Fix ping to link-local addresses.
ipv6: fix endianness error in icmpv6_err
ANDROID: dm: android-verity: Allow android-verity to be compiled as an independent module
backporting: a brief introduce of backported feautures on 4.4
Linux 4.4.20
sysfs: correctly handle read offset on PREALLOC attrs
hwmon: (iio_hwmon) fix memory leak in name attribute
ALSA: line6: Fix POD sysfs attributes segfault
ALSA: line6: Give up on the lock while URBs are released.
ALSA: line6: Remove double line6_pcm_release() after failed acquire.
ACPI / SRAT: fix SRAT parsing order with both LAPIC and X2APIC present
ACPI / sysfs: fix error code in get_status()
ACPI / drivers: replace acpi_probe_lock spinlock with mutex
ACPI / drivers: fix typo in ACPI_DECLARE_PROBE_ENTRY macro
staging: comedi: ni_mio_common: fix wrong insn_write handler
staging: comedi: ni_mio_common: fix AO inttrig backwards compatibility
staging: comedi: comedi_test: fix timer race conditions
staging: comedi: daqboard2000: bug fix board type matching code
USB: serial: option: add WeTelecom 0x6802 and 0x6803 products
USB: serial: option: add WeTelecom WM-D200
USB: serial: mos7840: fix non-atomic allocation in write path
USB: serial: mos7720: fix non-atomic allocation in write path
USB: fix typo in wMaxPacketSize validation
usb: chipidea: udc: don't touch DP when controller is in host mode
USB: avoid left shift by -1
dmaengine: usb-dmac: check CHCR.DE bit in usb_dmac_isr_channel()
crypto: qat - fix aes-xts key sizes
crypto: nx - off by one bug in nx_of_update_msc()
Input: i8042 - set up shared ps2_cmd_mutex for AUX ports
Input: i8042 - break load dependency between atkbd/psmouse and i8042
Input: tegra-kbc - fix inverted reset logic
btrfs: properly track when rescan worker is running
btrfs: waiting on qgroup rescan should not always be interruptible
fs/seq_file: fix out-of-bounds read
gpio: Fix OF build problem on UM
usb: renesas_usbhs: gadget: fix return value check in usbhs_mod_gadget_probe()
megaraid_sas: Fix probing cards without io port
mpt3sas: Fix resume on WarpDrive flash cards
cdc-acm: fix wrong pipe type on rx interrupt xfers
i2c: cros-ec-tunnel: Fix usage of cros_ec_cmd_xfer()
mfd: cros_ec: Add cros_ec_cmd_xfer_status() helper
aacraid: Check size values after double-fetch from user
ARC: Elide redundant setup of DMA callbacks
ARC: Call trace_hardirqs_on() before enabling irqs
ARC: use correct offset in pt_regs for saving/restoring user mode r25
ARC: build: Better way to detect ISA compatible toolchain
drm/i915: fix aliasing_ppgtt leak
drm/amdgpu: record error code when ring test failed
drm/amd/amdgpu: sdma resume fail during S4 on CI
drm/amdgpu: skip TV/CV in display parsing
drm/amdgpu: avoid a possible array overflow
drm/amdgpu: fix amdgpu_move_blit on 32bit systems
drm/amdgpu: Change GART offset to 64-bit
iio: fix sched WARNING "do not call blocking ops when !TASK_RUNNING"
sched/nohz: Fix affine unpinned timers mess
sched/cputime: Fix NO_HZ_FULL getrusage() monotonicity regression
of: fix reference counting in of_graph_get_endpoint_by_regs
arm64: dts: rockchip: add reset saradc node for rk3368 SoCs
mac80211: fix purging multicast PS buffer queue
s390/dasd: fix hanging device after clear subchannel
EDAC: Increment correct counter in edac_inc_ue_error()
pinctrl/amd: Remove the default de-bounce time
iommu/arm-smmu: Don't BUG() if we find aborting STEs with disable_bypass
iommu/arm-smmu: Fix CMDQ error handling
iommu/dma: Don't put uninitialised IOVA domains
xhci: Make sure xhci handles USB_SPEED_SUPER_PLUS devices.
USB: serial: ftdi_sio: add PIDs for Ivium Technologies devices
USB: serial: ftdi_sio: add device ID for WICED USB UART dev board
USB: serial: option: add support for Telit LE920A4
USB: serial: option: add D-Link DWM-156/A3
USB: serial: fix memleak in driver-registration error path
xhci: don't dereference a xhci member after removing xhci
usb: xhci: Fix panic if disconnect
xhci: always handle "Command Ring Stopped" events
usb/gadget: fix gadgetfs aio support.
usb: gadget: fsl_qe_udc: off by one in setup_received_handle()
USB: validate wMaxPacketValue entries in endpoint descriptors
usb: renesas_usbhs: Use dmac only if the pipe type is bulk
usb: renesas_usbhs: clear the BRDYSTS in usbhsg_ep_enable()
USB: hub: change the locking in hub_activate
USB: hub: fix up early-exit pathway in hub_activate
usb: hub: Fix unbalanced reference count/memory leak/deadlocks
usb: define USB_SPEED_SUPER_PLUS speed for SuperSpeedPlus USB3.1 devices
usb: dwc3: gadget: increment request->actual once
usb: dwc3: pci: add Intel Kabylake PCI ID
usb: misc: usbtest: add fix for driver hang
usb: ehci: change order of register cleanup during shutdown
crypto: caam - defer aead_set_sh_desc in case of zero authsize
crypto: caam - fix echainiv(authenc) encrypt shared descriptor
crypto: caam - fix non-hmac hashes
genirq/msi: Make sure PCI MSIs are activated early
genirq/msi: Remove unused MSI_FLAG_IDENTITY_MAP
um: Don't discard .text.exit section
ACPI / CPPC: Prevent cpc_desc_ptr points to the invalid data
ACPI: CPPC: Return error if _CPC is invalid on a CPU
mmc: sdhci-acpi: Reduce Baytrail eMMC/SD/SDIO hangs
PCI: Limit config space size for Netronome NFP4000
PCI: Add Netronome NFP4000 PF device ID
PCI: Limit config space size for Netronome NFP6000 family
PCI: Add Netronome vendor and device IDs
PCI: Support PCIe devices with short cfg_size
NVMe: Don't unmap controller registers on reset
ALSA: hda - Manage power well properly for resume
libnvdimm, nd_blk: mask off reserved status bits
perf intel-pt: Fix occasional decoding errors when tracing system-wide
vfio/pci: Fix NULL pointer oops in error interrupt setup handling
virtio: fix memory leak in virtqueue_add()
parisc: Fix order of EREFUSED define in errno.h
arm64: Define AT_VECTOR_SIZE_ARCH for ARCH_DLINFO
ALSA: usb-audio: Add quirk for ELP HD USB Camera
ALSA: usb-audio: Add a sample rate quirk for Creative Live! Cam Socialize HD (VF0610)
powerpc/eeh: eeh_pci_enable(): fix checking of post-request state
SUNRPC: allow for upcalls for same uid but different gss service
SUNRPC: Handle EADDRNOTAVAIL on connection failures
tools/testing/nvdimm: fix SIGTERM vs hotplug crash
uprobes/x86: Fix RIP-relative handling of EVEX-encoded instructions
x86/mm: Disable preemption during CR3 read+write
hugetlb: fix nr_pmds accounting with shared page tables
mm: SLUB hardened usercopy support
mm: SLAB hardened usercopy support
s390/uaccess: Enable hardened usercopy
sparc/uaccess: Enable hardened usercopy
powerpc/uaccess: Enable hardened usercopy
ia64/uaccess: Enable hardened usercopy
arm64/uaccess: Enable hardened usercopy
ARM: uaccess: Enable hardened usercopy
x86/uaccess: Enable hardened usercopy
x86: remove more uaccess_32.h complexity
x86: remove pointless uaccess_32.h complexity
x86: fix SMAP in 32-bit environments
Use the new batched user accesses in generic user string handling
Add 'unsafe' user access functions for batched accesses
x86: reorganize SMAP handling in user space accesses
mm: Hardened usercopy
mm: Implement stack frame object validation
mm: Add is_migrate_cma_page
Linux 4.4.19
Documentation/module-signing.txt: Note need for version info if reusing a key
module: Invalidate signatures on force-loaded modules
dm flakey: error READ bios during the down_interval
rtc: s3c: Add s3c_rtc_{enable/disable}_clk in s3c_rtc_setfreq()
lpfc: fix oops in lpfc_sli4_scmd_to_wqidx_distr() from lpfc_send_taskmgmt()
ACPI / EC: Work around method reentrancy limit in ACPICA for _Qxx
x86/platform/intel_mid_pci: Rework IRQ0 workaround
PCI: Mark Atheros AR9485 and QCA9882 to avoid bus reset
MIPS: hpet: Increase HPET_MIN_PROG_DELTA and decrease HPET_MIN_CYCLES
MIPS: Don't register r4k sched clock when CPUFREQ enabled
MIPS: mm: Fix definition of R6 cache instruction
SUNRPC: Don't allocate a full sockaddr_storage for tracing
Input: elan_i2c - properly wake up touchpad on ASUS laptops
target: Fix ordered task CHECK_CONDITION early exception handling
target: Fix max_unmap_lba_count calc overflow
target: Fix race between iscsi-target connection shutdown + ABORT_TASK
target: Fix missing complete during ABORT_TASK + CMD_T_FABRIC_STOP
target: Fix ordered task target_setup_cmd_from_cdb exception hang
iscsi-target: Fix panic when adding second TCP connection to iSCSI session
ubi: Fix race condition between ubi device creation and udev
ubi: Fix early logging
ubi: Make volume resize power cut aware
of: fix memory leak related to safe_name()
IB/mlx4: Fix memory leak if QP creation failed
IB/mlx4: Fix error flow when sending mads under SRIOV
IB/mlx4: Fix the SQ size of an RC QP
IB/IWPM: Fix a potential skb leak
IB/IPoIB: Don't update neigh validity for unresolved entries
IB/SA: Use correct free function
IB/mlx5: Return PORT_ERR in Active to Initializing tranisition
IB/mlx5: Fix post send fence logic
IB/mlx5: Fix entries check in mlx5_ib_resize_cq
IB/mlx5: Fix returned values of query QP
IB/mlx5: Fix entries checks in mlx5_ib_create_cq
IB/mlx5: Fix MODIFY_QP command input structure
ALSA: hda - Fix headset mic detection problem for two dell machines
ALSA: hda: add AMD Bonaire AZ PCI ID with proper driver caps
ALSA: hda/realtek - Can't adjust speaker's volume on a Dell AIO
ALSA: hda: Fix krealloc() with __GFP_ZERO usage
mm/hugetlb: avoid soft lockup in set_max_huge_pages()
mtd: nand: fix bug writing 1 byte less than page size
block: fix bdi vs gendisk lifetime mismatch
block: add missing group association in bio-cloning functions
metag: Fix __cmpxchg_u32 asm constraint for CMP
ftrace/recordmcount: Work around for addition of metag magic but not relocations
balloon: check the number of available pages in leak balloon
drm/i915/dp: Revert "drm/i915/dp: fall back to 18 bpp when sink capability is unknown"
drm/i915: Never fully mask the the EI up rps interrupt on SNB/IVB
drm/edid: Add 6 bpc quirk for display AEO model 0.
drm: Restore double clflush on the last partial cacheline
drm/nouveau/fbcon: fix font width not divisible by 8
drm/nouveau/gr/nv3x: fix instobj write offsets in gr setup
drm/nouveau: check for supported chipset before booting fbdev off the hw
drm/radeon: support backlight control for UNIPHY3
drm/radeon: fix firmware info version checks
drm/radeon: Poll for both connect/disconnect on analog connectors
drm/radeon: add a delay after ATPX dGPU power off
drm/amdgpu/gmc7: add missing mullins case
drm/amdgpu: fix firmware info version checks
drm/amdgpu: Disable RPM helpers while reprobing connectors on resume
drm/amdgpu: support backlight control for UNIPHY3
drm/amdgpu: Poll for both connect/disconnect on analog connectors
drm/amdgpu: add a delay after ATPX dGPU power off
w1:omap_hdq: fix regression
netlabel: add address family checks to netlbl_{sock,req}_delattr()
ARM: dts: sunxi: Add a startup delay for fixed regulator enabled phys
audit: fix a double fetch in audit_log_single_execve_arg()
iommu/amd: Update Alias-DTE in update_device_table()
iommu/amd: Init unity mappings only for dma_ops domains
iommu/amd: Handle IOMMU_DOMAIN_DMA in ops->domain_free call-back
iommu/vt-d: Return error code in domain_context_mapping_one()
iommu/exynos: Suppress unbinding to prevent system failure
drm/i915: Don't complain about lack of ACPI video bios
nfsd: don't return an unhashed lock stateid after taking mutex
nfsd: Fix race between FREE_STATEID and LOCK
nfs: don't create zero-length requests
MIPS: KVM: Propagate kseg0/mapped tlb fault errors
MIPS: KVM: Fix gfn range check in kseg0 tlb faults
MIPS: KVM: Add missing gfn range check
MIPS: KVM: Fix mapped fault broken commpage handling
random: add interrupt callback to VMBus IRQ handler
random: print a warning for the first ten uninitialized random users
random: initialize the non-blocking pool via add_hwgenerator_randomness()
CIFS: Fix a possible invalid memory access in smb2_query_symlink()
cifs: fix crash due to race in hmac(md5) handling
cifs: Check for existing directory when opening file with O_CREAT
fs/cifs: make share unaccessible at root level mountable
jbd2: make journal y2038 safe
ARC: mm: don't loose PTE_SPECIAL in pte_modify()
remoteproc: Fix potential race condition in rproc_add
ovl: disallow overlayfs as upperdir
HID: uhid: fix timeout when probe races with IO
EDAC: Correct channel count limit
Bluetooth: Fix l2cap_sock_setsockopt() with optname BT_RCVMTU
spi: pxa2xx: Clear all RFT bits in reset_sccr1() on Intel Quark
i2c: efm32: fix a failure path in efm32_i2c_probe()
s5p-mfc: Add release callback for memory region devs
s5p-mfc: Set device name for reserved memory region devs
hp-wmi: Fix wifi cannot be hard-unblocked
dm: set DMF_SUSPENDED* _before_ clearing DMF_NOFLUSH_SUSPENDING
sur40: fix occasional oopses on device close
sur40: lower poll interval to fix occasional FPS drops to ~56 FPS
Fix RC5 decoding with Fintek CIR chipset
vb2: core: Skip planes array verification if pb is NULL
videobuf2-v4l2: Verify planes array in buffer dequeueing
media: dvb_ringbuffer: Add memory barriers
media: usbtv: prevent access to free'd resources
mfd: qcom_rpm: Parametrize also ack selector size
mfd: qcom_rpm: Fix offset error for msm8660
intel_pstate: Fix MSR_CONFIG_TDP_x addressing in core_get_max_pstate()
s390/cio: allow to reset channel measurement block
KVM: nVMX: Fix memory corruption when using VMCS shadowing
KVM: VMX: handle PML full VMEXIT that occurs during event delivery
KVM: MTRR: fix kvm_mtrr_check_gfn_range_consistency page fault
KVM: PPC: Book3S HV: Save/restore TM state in H_CEDE
KVM: PPC: Book3S HV: Pull out TM state save/restore into separate procedures
arm64: mm: avoid fdt_check_header() before the FDT is fully mapped
arm64: dts: rockchip: fixes the gic400 2nd region size for rk3368
pinctrl: cherryview: prevent concurrent access to GPIO controllers
Bluetooth: hci_intel: Fix null gpio desc pointer dereference
gpio: intel-mid: Remove potentially harmful code
gpio: pca953x: Fix NBANK calculation for PCA9536
tty/serial: atmel: fix RS485 half duplex with DMA
serial: samsung: Fix ERR pointer dereference on deferred probe
tty: serial: msm: Don't read off end of tx fifo
arm64: Fix incorrect per-cpu usage for boot CPU
arm64: debug: unmask PSTATE.D earlier
arm64: kernel: Save and restore UAO and addr_limit on exception entry
USB: usbfs: fix potential infoleak in devio
usb: renesas_usbhs: fix NULL pointer dereference in xfer_work()
USB: serial: option: add support for Telit LE910 PID 0x1206
usb: dwc3: fix for the isoc transfer EP_BUSY flag
usb: quirks: Add no-lpm quirk for Elan
usb: renesas_usbhs: protect the CFIFOSEL setting in usbhsg_ep_enable()
usb: f_fs: off by one bug in _ffs_func_bind()
usb: gadget: avoid exposing kernel stack
UPSTREAM: usb: gadget: configfs: add mutex lock before unregister gadget
ANDROID: dm-verity: adopt changes made to dm callbacks
UPSTREAM: ecryptfs: fix handling of directory opening
ANDROID: net: core: fix UID-based routing
ANDROID: net: fib: remove duplicate assignment
FROMLIST: proc: Fix timerslack_ns CAP_SYS_NICE check when adjusting self
ANDROID: dm verity fec: pack the fec_header structure
ANDROID: dm: android-verity: Verify header before fetching table
ANDROID: dm: allow adb disable-verity only in userdebug
ANDROID: dm: mount as linear target if eng build
ANDROID: dm: use default verity public key
ANDROID: dm: fix signature verification flag
ANDROID: dm: use name_to_dev_t
ANDROID: dm: rename dm-linear methods for dm-android-verity
ANDROID: dm: Minor cleanup
ANDROID: dm: Mounting root as linear device when verity disabled
ANDROID: dm-android-verity: Rebase on top of 4.1
ANDROID: dm: Add android verity target
ANDROID: dm: fix dm_substitute_devices()
ANDROID: dm: Rebase on top of 4.1
CHROMIUM: dm: boot time specification of dm=
Implement memory_state_time, used by qcom,cpubw
Revert "panic: Add board ID to panic output"
usb: gadget: f_accessory: remove duplicate endpoint alloc
BACKPORT: brcmfmac: defer DPC processing during probe
FROMLIST: proc: Add LSM hook checks to /proc/<tid>/timerslack_ns
FROMLIST: proc: Relax /proc/<tid>/timerslack_ns capability requirements
UPSTREAM: ppp: defer netns reference release for ppp channel
cpuset: Add allow_attach hook for cpusets on android.
UPSTREAM: KEYS: Fix ASN.1 indefinite length object parsing
ANDROID: sdcardfs: fix itnull.cocci warnings
android-recommended.cfg: enable fstack-protector-strong
Linux 4.4.18
mm: memcontrol: fix memcg id ref counter on swap charge move
mm: memcontrol: fix swap counter leak on swapout from offline cgroup
mm: memcontrol: fix cgroup creation failure after many small jobs
ext4: fix reference counting bug on block allocation error
ext4: short-cut orphan cleanup on error
ext4: validate s_reserved_gdt_blocks on mount
ext4: don't call ext4_should_journal_data() on the journal inode
ext4: fix deadlock during page writeback
ext4: check for extents that wrap around
crypto: scatterwalk - Fix test in scatterwalk_done
crypto: gcm - Filter out async ghash if necessary
fs/dcache.c: avoid soft-lockup in dput()
fuse: fix wrong assignment of ->flags in fuse_send_init()
fuse: fuse_flush must check mapping->flags for errors
fuse: fsync() did not return IO errors
sysv, ipc: fix security-layer leaking
block: fix use-after-free in seq file
x86/syscalls/64: Add compat_sys_keyctl for 32-bit userspace
drm/i915: Pretend cursor is always on for ILK-style WM calculations (v2)
x86/mm/pat: Fix BUG_ON() in mmap_mem() on QEMU/i386
x86/pat: Document the PAT initialization sequence
x86/xen, pat: Remove PAT table init code from Xen
x86/mtrr: Fix PAT init handling when MTRR is disabled
x86/mtrr: Fix Xorg crashes in Qemu sessions
x86/mm/pat: Replace cpu_has_pat with boot_cpu_has()
x86/mm/pat: Add pat_disable() interface
x86/mm/pat: Add support of non-default PAT MSR setting
devpts: clean up interface to pty drivers
random: strengthen input validation for RNDADDTOENTCNT
apparmor: fix ref count leak when profile sha1 hash is read
Revert "s390/kdump: Clear subchannel ID to signal non-CCW/SCSI IPL"
KEYS: 64-bit MIPS needs to use compat_sys_keyctl for 32-bit userspace
arm: oabi compat: add missing access checks
cdc_ncm: do not call usbnet_link_change from cdc_ncm_bind
i2c: i801: Allow ACPI SystemIO OpRegion to conflict with PCI BAR
x86/mm/32: Enable full randomization on i386 and X86_32
HID: sony: do not bail out when the sixaxis refuses the output report
PNP: Add Broadwell to Intel MCH size workaround
PNP: Add Haswell-ULT to Intel MCH size workaround
scsi: ignore errors from scsi_dh_add_device()
ipath: Restrict use of the write() interface
tcp: consider recv buf for the initial window scale
qed: Fix setting/clearing bit in completion bitmap
net/irda: fix NULL pointer dereference on memory allocation failure
net: bgmac: Fix infinite loop in bgmac_dma_tx_add()
bonding: set carrier off for devices created through netlink
ipv4: reject RTNH_F_DEAD and RTNH_F_LINKDOWN from user space
tcp: enable per-socket rate limiting of all 'challenge acks'
tcp: make challenge acks less predictable
arm64: relocatable: suppress R_AARCH64_ABS64 relocations in vmlinux
arm64: vmlinux.lds: make __rela_offset and __dynsym_offset ABSOLUTE
Linux 4.4.17
vfs: fix deadlock in file_remove_privs() on overlayfs
intel_th: Fix a deadlock in modprobing
intel_th: pci: Add Kaby Lake PCH-H support
net: mvneta: set real interrupt per packet for tx_done
libceph: apply new_state before new_up_client on incrementals
libata: LITE-ON CX1-JB256-HP needs lower max_sectors
i2c: mux: reg: wrong condition checked for of_address_to_resource return value
posix_cpu_timer: Exit early when process has been reaped
media: fix airspy usb probe error path
ipr: Clear interrupt on croc/crocodile when running with LSI
SCSI: fix new bug in scsi_dev_info_list string matching
RDS: fix rds_tcp_init() error path
can: fix oops caused by wrong rtnl dellink usage
can: fix handling of unmodifiable configuration options fix
can: c_can: Update D_CAN TX and RX functions to 32 bit - fix Altera Cyclone access
can: at91_can: RX queue could get stuck at high bus load
perf/x86: fix PEBS issues on Intel Atom/Core2
ovl: handle ATTR_KILL*
sched/fair: Fix effective_load() to consistently use smoothed load
mmc: block: fix packed command header endianness
block: fix use-after-free in sys_ioprio_get()
qeth: delete napi struct when removing a qeth device
platform/chrome: cros_ec_dev - double fetch bug in ioctl
clk: rockchip: initialize flags of clk_init_data in mmc-phase clock
spi: sun4i: fix FIFO limit
spi: sunxi: fix transfer timeout
namespace: update event counter when umounting a deleted dentry
9p: use file_dentry()
ext4: verify extent header depth
ecryptfs: don't allow mmap when the lower fs doesn't support it
Revert "ecryptfs: forbid opening files without mmap handler"
locks: use file_inode()
power_supply: power_supply_read_temp only if use_cnt > 0
cgroup: set css->id to -1 during init
pinctrl: imx: Do not treat a PIN without MUX register as an error
pinctrl: single: Fix missing flush of posted write for a wakeirq
pvclock: Add CPU barriers to get correct version value
Input: tsc200x - report proper input_dev name
Input: xpad - validate USB endpoint count during probe
Input: wacom_w8001 - w8001_MAX_LENGTH should be 13
Input: xpad - fix oops when attaching an unknown Xbox One gamepad
Input: elantech - add more IC body types to the list
Input: vmmouse - remove port reservation
ALSA: timer: Fix leak in events via snd_timer_user_tinterrupt
ALSA: timer: Fix leak in events via snd_timer_user_ccallback
ALSA: timer: Fix leak in SNDRV_TIMER_IOCTL_PARAMS
xenbus: don't bail early from xenbus_dev_request_and_reply()
xenbus: don't BUG() on user mode induced condition
xen/pciback: Fix conf_space read/write overlap check.
ARC: unwind: ensure that .debug_frame is generated (vs. .eh_frame)
arc: unwind: warn only once if DW2_UNWIND is disabled
kernel/sysrq, watchdog, sched/core: Reset watchdog on all CPUs while processing sysrq-w
pps: do not crash when failed to register
vmlinux.lds: account for destructor sections
mm, meminit: ensure node is online before checking whether pages are uninitialised
mm, meminit: always return a valid node from early_pfn_to_nid
mm, compaction: prevent VM_BUG_ON when terminating freeing scanner
fs/nilfs2: fix potential underflow in call to crc32_le
mm, compaction: abort free scanner if split fails
mm, sl[au]b: add __GFP_ATOMIC to the GFP reclaim mask
dmaengine: at_xdmac: double FIFO flush needed to compute residue
dmaengine: at_xdmac: fix residue corruption
dmaengine: at_xdmac: align descriptors on 64 bits
x86/quirks: Add early quirk to reset Apple AirPort card
x86/quirks: Reintroduce scanning of secondary buses
x86/quirks: Apply nvidia_bugs quirk only on root bus
USB: OHCI: Don't mark EDs as ED_OPER if scheduling fails
Conflicts:
arch/arm/kernel/topology.c
arch/arm64/include/asm/arch_gicv3.h
arch/arm64/kernel/topology.c
block/bio.c
drivers/cpufreq/Kconfig
drivers/md/Makefile
drivers/media/dvb-core/dvb_ringbuffer.c
drivers/media/tuners/tuner-xc2028.c
drivers/misc/Kconfig
drivers/misc/Makefile
drivers/mmc/core/host.c
drivers/scsi/ufs/ufshcd.c
drivers/scsi/ufs/ufshcd.h
drivers/usb/dwc3/gadget.c
drivers/usb/gadget/configfs.c
fs/ecryptfs/file.c
include/linux/mmc/core.h
include/linux/mmc/host.h
include/linux/mmzone.h
include/linux/sched.h
include/linux/sched/sysctl.h
include/trace/events/power.h
include/trace/events/sched.h
init/Kconfig
kernel/cpuset.c
kernel/exit.c
kernel/sched/Makefile
kernel/sched/core.c
kernel/sched/cputime.c
kernel/sched/fair.c
kernel/sched/features.h
kernel/sched/rt.c
kernel/sched/sched.h
kernel/sched/stop_task.c
kernel/sched/tune.c
lib/Kconfig.debug
mm/Makefile
mm/vmstat.c
Change-Id: I243a43231ca56a6362076fa6301827e1b0493be5
Signed-off-by: Runmin Wang <runminw@codeaurora.org>
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* msm-4.4/tmp-510d0a3f:
Linux 4.4.11
nf_conntrack: avoid kernel pointer value leak in slab name
drm/radeon: fix DP link training issue with second 4K monitor
drm/i915/bdw: Add missing delay during L3 SQC credit programming
drm/i915: Bail out of pipe config compute loop on LPT
drm/radeon: fix PLL sharing on DCE6.1 (v2)
Revert "[media] videobuf2-v4l2: Verify planes array in buffer dequeueing"
Input: max8997-haptic - fix NULL pointer dereference
get_rock_ridge_filename(): handle malformed NM entries
tools lib traceevent: Do not reassign parg after collapse_tree()
qla1280: Don't allocate 512kb of host tags
atomic_open(): fix the handling of create_error
regulator: axp20x: Fix axp22x ldo_io voltage ranges
regulator: s2mps11: Fix invalid selector mask and voltages for buck9
workqueue: fix rebind bound workers warning
ARM: dts: at91: sam9x5: Fix the memory range assigned to the PMC
vfs: rename: check backing inode being equal
vfs: add vfs_select_inode() helper
perf/core: Disable the event on a truncated AUX record
regmap: spmi: Fix regmap_spmi_ext_read in multi-byte case
pinctrl: at91-pio4: fix pull-up/down logic
spi: spi-ti-qspi: Handle truncated frames properly
spi: spi-ti-qspi: Fix FLEN and WLEN settings if bits_per_word is overridden
spi: pxa2xx: Do not detect number of enabled chip selects on Intel SPT
ALSA: hda - Fix broken reconfig
ALSA: hda - Fix white noise on Asus UX501VW headset
ALSA: hda - Fix subwoofer pin on ASUS N751 and N551
ALSA: usb-audio: Yet another Phoneix Audio device quirk
ALSA: usb-audio: Quirk for yet another Phoenix Audio devices (v2)
crypto: testmgr - Use kmalloc memory for RSA input
crypto: hash - Fix page length clamping in hash walk
crypto: qat - fix invalid pf2vf_resp_wq logic
s390/mm: fix asce_bits handling with dynamic pagetable levels
zsmalloc: fix zs_can_compact() integer overflow
ocfs2: fix posix_acl_create deadlock
ocfs2: revert using ocfs2_acl_chmod to avoid inode cluster lock hang
net/route: enforce hoplimit max value
tcp: refresh skb timestamp at retransmit time
net: thunderx: avoid exposing kernel stack
net: fix a kernel infoleak in x25 module
uapi glibc compat: fix compile errors when glibc net/if.h included before linux/if.h MIME-Version: 1.0
bridge: fix igmp / mld query parsing
net: bridge: fix old ioctl unlocked net device walk
VSOCK: do not disconnect socket when peer has shutdown SEND only
net/mlx4_en: Fix endianness bug in IPV6 csum calculation
net: fix infoleak in rtnetlink
net: fix infoleak in llc
net: fec: only clear a queue's work bit if the queue was emptied
netem: Segment GSO packets on enqueue
sch_dsmark: update backlog as well
sch_htb: update backlog as well
net_sched: update hierarchical backlog too
net_sched: introduce qdisc_replace() helper
gre: do not pull header in ICMP error processing
net: Implement net_dbg_ratelimited() for CONFIG_DYNAMIC_DEBUG case
samples/bpf: fix trace_output example
bpf: fix check_map_func_compatibility logic
bpf: fix refcnt overflow
bpf: fix double-fdput in replace_map_fd_with_map_ptr()
net/mlx4_en: fix spurious timestamping callbacks
ipv4/fib: don't warn when primary address is missing if in_dev is dead
net/mlx5e: Fix minimum MTU
net/mlx5e: Device's mtu field is u16 and not int
openvswitch: use flow protocol when recalculating ipv6 checksums
atl2: Disable unimplemented scatter/gather feature
vlan: pull on __vlan_insert_tag error path and fix csum correction
net: use skb_postpush_rcsum instead of own implementations
cdc_mbim: apply "NDP to end" quirk to all Huawei devices
bpf/verifier: reject invalid LD_ABS | BPF_DW instruction
net: sched: do not requeue a NULL skb
packet: fix heap info leak in PACKET_DIAG_MCLIST sock_diag interface
route: do not cache fib route info on local routes with oif
decnet: Do not build routes to devices without decnet private data.
parisc: Use generic extable search and sort routines
arm64: kasan: Use actual memory node when populating the kernel image shadow
arm64: mm: treat memstart_addr as a signed quantity
arm64: lse: deal with clobbered IP registers after branch via PLT
arm64: mm: check at build time that PAGE_OFFSET divides the VA space evenly
arm64: kasan: Fix zero shadow mapping overriding kernel image shadow
arm64: consistently use p?d_set_huge
arm64: fix KASLR boot-time I-cache maintenance
arm64: hugetlb: partial revert of 66b3923a1a0f
arm64: make irq_stack_ptr more robust
arm64: efi: invoke EFI_RNG_PROTOCOL to supply KASLR randomness
efi: stub: use high allocation for converted command line
efi: stub: add implementation of efi_random_alloc()
efi: stub: implement efi_get_random_bytes() based on EFI_RNG_PROTOCOL
arm64: kaslr: randomize the linear region
arm64: add support for kernel ASLR
arm64: add support for building vmlinux as a relocatable PIE binary
arm64: switch to relative exception tables
extable: add support for relative extables to search and sort routines
scripts/sortextable: add support for ET_DYN binaries
arm64: futex.h: Add missing PAN toggling
arm64: make asm/elf.h available to asm files
arm64: avoid dynamic relocations in early boot code
arm64: avoid R_AARCH64_ABS64 relocations for Image header fields
arm64: add support for module PLTs
arm64: move brk immediate argument definitions to separate header
arm64: mm: use bit ops rather than arithmetic in pa/va translations
arm64: mm: only perform memstart_addr sanity check if DEBUG_VM
arm64: User die() instead of panic() in do_page_fault()
arm64: allow kernel Image to be loaded anywhere in physical memory
arm64: defer __va translation of initrd_start and initrd_end
arm64: move kernel image to base of vmalloc area
arm64: kvm: deal with kernel symbols outside of linear mapping
arm64: decouple early fixmap init from linear mapping
arm64: pgtable: implement static [pte|pmd|pud]_offset variants
arm64: introduce KIMAGE_VADDR as the virtual base of the kernel region
arm64: add support for ioremap() block mappings
arm64: prevent potential circular header dependencies in asm/bug.h
of/fdt: factor out assignment of initrd_start/initrd_end
of/fdt: make memblock minimum physical address arch configurable
arm64: Remove the get_thread_info() function
arm64: kernel: Don't toggle PAN on systems with UAO
arm64: cpufeature: Test 'matches' pointer to find the end of the list
arm64: kernel: Add support for User Access Override
arm64: add ARMv8.2 id_aa64mmfr2 boiler plate
arm64: cpufeature: Change read_cpuid() to use sysreg's mrs_s macro
arm64: use local label prefixes for __reg_num symbols
arm64: vdso: Mark vDSO code as read-only
arm64: ubsan: select ARCH_HAS_UBSAN_SANITIZE_ALL
arm64: ptdump: Indicate whether memory should be faulting
arm64: Add support for ARCH_SUPPORTS_DEBUG_PAGEALLOC
arm64: Drop alloc function from create_mapping
arm64: prefetch: add missing #include for spin_lock_prefetch
arm64: lib: patch in prfm for copy_page if requested
arm64: lib: improve copy_page to deal with 128 bytes at a time
arm64: prefetch: add alternative pattern for CPUs without a prefetcher
arm64: prefetch: don't provide spin_lock_prefetch with LSE
arm64: allow vmalloc regions to be set with set_memory_*
arm64: kernel: implement ACPI parking protocol
arm64: mm: create new fine-grained mappings at boot
arm64: ensure _stext and _etext are page-aligned
arm64: mm: allow passing a pgdir to alloc_init_*
arm64: mm: allocate pagetables anywhere
arm64: mm: use fixmap when creating page tables
arm64: mm: add functions to walk tables in fixmap
arm64: mm: add __{pud,pgd}_populate
arm64: mm: avoid redundant __pa(__va(x))
arm64: mm: add functions to walk page tables by PA
arm64: mm: move pte_* macros
arm64: kasan: avoid TLB conflicts
arm64: mm: add code to safely replace TTBR1_EL1
arm64: add function to install the idmap
arm64: unmap idmap earlier
arm64: unify idmap removal
arm64: mm: place empty_zero_page in bss
arm64: mm: specialise pagetable allocators
asm-generic: Fix local variable shadow in __set_fixmap_offset
Eliminate the .eh_frame sections from the aarch64 vmlinux and kernel modules
arm64: Fix an enum typo in mm/dump.c
arm64: kasan: ensure that the KASAN zero page is mapped read-only
arch/arm64/include/asm/pgtable.h: add pmd_mkclean for THP
arm64: hide __efistub_ aliases from kallsyms
Linux 4.4.10
drm/i915/skl: Fix DMC load on Skylake J0 and K0
lib/test-string_helpers.c: fix and improve string_get_size() tests
ACPI / processor: Request native thermal interrupt handling via _OSC
drm/i915: Fake HDMI live status
drm/i915: Make RPS EI/thresholds multiple of 25 on SNB-BDW
drm/i915: Fix eDP low vswing for Broadwell
drm/i915/ddi: Fix eDP VDD handling during booting and suspend/resume
drm/radeon: make sure vertical front porch is at least 1
iio: ak8975: fix maybe-uninitialized warning
iio: ak8975: Fix NULL pointer exception on early interrupt
drm/amdgpu: set metadata pointer to NULL after freeing.
drm/amdgpu: make sure vertical front porch is at least 1
gpu: ipu-v3: Fix imx-ipuv3-crtc module autoloading
nvmem: mxs-ocotp: fix buffer overflow in read
USB: serial: cp210x: add Straizona Focusers device ids
USB: serial: cp210x: add ID for Link ECU
ata: ahci-platform: Add ports-implemented DT bindings.
libahci: save port map for forced port map
powerpc: Fix bad inline asm constraint in create_zero_mask()
ACPICA: Dispatcher: Update thread ID for recursive method calls
x86/sysfb_efi: Fix valid BAR address range check
ARC: Add missing io barriers to io{read,write}{16,32}be()
ARM: cpuidle: Pass on arm_cpuidle_suspend()'s return value
propogate_mnt: Handle the first propogated copy being a slave
fs/pnode.c: treat zero mnt_group_id-s as unequal
x86/tsc: Read all ratio bits from MSR_PLATFORM_INFO
MAINTAINERS: Remove asterisk from EFI directory names
writeback: Fix performance regression in wb_over_bg_thresh()
batman-adv: Reduce refcnt of removed router when updating route
batman-adv: Fix broadcast/ogm queue limit on a removed interface
batman-adv: Check skb size before using encapsulated ETH+VLAN header
batman-adv: fix DAT candidate selection (must use vid)
mm: update min_free_kbytes from khugepaged after core initialization
proc: prevent accessing /proc/<PID>/environ until it's ready
Input: zforce_ts - fix dual touch recognition
HID: Fix boot delay for Creative SB Omni Surround 5.1 with quirk
HID: wacom: Add support for DTK-1651
xen/evtchn: fix ring resize when binding new events
xen/balloon: Fix crash when ballooning on x86 32 bit PAE
xen: Fix page <-> pfn conversion on 32 bit systems
ARM: SoCFPGA: Fix secondary CPU startup in thumb2 kernel
ARM: EXYNOS: Properly skip unitialized parent clock in power domain on
mm/zswap: provide unique zpool name
mm, cma: prevent nr_isolated_* counters from going negative
Minimal fix-up of bad hashing behavior of hash_64()
MD: make bio mergeable
tracing: Don't display trigger file for events that can't be enabled
mac80211: fix statistics leak if dev_alloc_name() fails
ath9k: ar5008_hw_cmn_spur_mitigate: add missing mask_m & mask_p initialisation
lpfc: fix misleading indentation
clk: qcom: msm8960: Fix ce3_src register offset
clk: versatile: sp810: support reentrance
clk: qcom: msm8960: fix ce3_core clk enable register
clk: meson: Fix meson_clk_register_clks() signature type mismatch
clk: rockchip: free memory in error cases when registering clock branches
soc: rockchip: power-domain: fix err handle while probing
clk-divider: make sure read-only dividers do not write to their register
CNS3xxx: Fix PCI cns3xxx_write_config()
mwifiex: fix corner case association failure
ata: ahci_xgene: dereferencing uninitialized pointer in probe
nbd: ratelimit error msgs after socket close
mfd: intel-lpss: Remove clock tree on error path
ipvs: drop first packet to redirect conntrack
ipvs: correct initial offset of Call-ID header search in SIP persistence engine
ipvs: handle ip_vs_fill_iph_skb_off failure
RDMA/iw_cxgb4: Fix bar2 virt addr calculation for T4 chips
Revert: "powerpc/tm: Check for already reclaimed tasks"
arm64: head.S: use memset to clear BSS
efi: stub: define DISABLE_BRANCH_PROFILING for all architectures
arm64: entry: remove pointless SPSR mode check
arm64: mm: move pgd_cache initialisation to pgtable_cache_init
arm64: module: avoid undefined shift behavior in reloc_data()
arm64: module: fix relocation of movz instruction with negative immediate
arm64: traps: address fallout from printk -> pr_* conversion
arm64: ftrace: fix a stack tracer's output under function graph tracer
arm64: pass a task parameter to unwind_frame()
arm64: ftrace: modify a stack frame in a safe way
arm64: remove irq_count and do_softirq_own_stack()
arm64: hugetlb: add support for PTE contiguous bit
arm64: Use PoU cache instr for I/D coherency
arm64: Defer dcache flush in __cpu_copy_user_page
arm64: reduce stack use in irq_handler
arm64: Documentation: add list of software workarounds for errata
arm64: mm: place __cpu_setup in .text
arm64: cmpxchg: Don't incldue linux/mmdebug.h
arm64: mm: fold alternatives into .init
arm64: Remove redundant padding from linker script
arm64: mm: remove pointless PAGE_MASKing
arm64: don't call C code with el0's fp register
arm64: when walking onto the task stack, check sp & fp are in current->stack
arm64: Add this_cpu_ptr() assembler macro for use in entry.S
arm64: irq: fix walking from irq stack to task stack
arm64: Add do_softirq_own_stack() and enable irq_stacks
arm64: Modify stack trace and dump for use with irq_stack
arm64: Store struct thread_info in sp_el0
arm64: Add trace_hardirqs_off annotation in ret_to_user
arm64: ftrace: fix the comments for ftrace_modify_code
arm64: ftrace: stop using kstop_machine to enable/disable tracing
arm64: spinlock: serialise spin_unlock_wait against concurrent lockers
arm64: enable HAVE_IRQ_TIME_ACCOUNTING
arm64: fix COMPAT_SHMLBA definition for large pages
arm64: add __init/__initdata section marker to some functions/variables
arm64: pgtable: implement pte_accessible()
arm64: mm: allow sections for unaligned bases
arm64: mm: detect bad __create_mapping uses
Linux 4.4.9
extcon: max77843: Use correct size for reading the interrupt register
stm class: Select CONFIG_SRCU
megaraid_sas: add missing curly braces in ioctl handler
sunrpc/cache: drop reference when sunrpc_cache_pipe_upcall() detects a race
thermal: rockchip: fix a impossible condition caused by the warning
unbreak allmodconfig KCONFIG_ALLCONFIG=...
jme: Fix device PM wakeup API usage
jme: Do not enable NIC WoL functions on S0
bus: imx-weim: Take the 'status' property value into account
ARM: dts: pxa: fix dma engine node to pxa3xx-nand
ARM: dts: armada-375: use armada-370-sata for SATA
ARM: EXYNOS: select THERMAL_OF
ARM: prima2: always enable reset controller
ARM: OMAP3: Add cpuidle parameters table for omap3430
ext4: fix races of writeback with punch hole and zero range
ext4: fix races between buffered IO and collapse / insert range
ext4: move unlocked dio protection from ext4_alloc_file_blocks()
ext4: fix races between page faults and hole punching
perf stat: Document --detailed option
perf tools: handle spaces in file names obtained from /proc/pid/maps
perf hists browser: Only offer symbol scripting when a symbol is under the cursor
mtd: nand: Drop mtd.owner requirement in nand_scan
mtd: brcmnand: Fix v7.1 register offsets
mtd: spi-nor: remove micron_quad_enable()
serial: sh-sci: Remove cpufreq notifier to fix crash/deadlock
ext4: fix NULL pointer dereference in ext4_mark_inode_dirty()
x86/mm/kmmio: Fix mmiotrace for hugepages
perf evlist: Reference count the cpu and thread maps at set_maps()
drivers/misc/ad525x_dpot: AD5274 fix RDAC read back errors
rtc: max77686: Properly handle regmap_irq_get_virq() error code
rtc: rx8025: remove rv8803 id
rtc: ds1685: passing bogus values to irq_restore
rtc: vr41xx: Wire up alarm_irq_enable
rtc: hym8563: fix invalid year calculation
PM / Domains: Fix removal of a subdomain
PM / OPP: Initialize u_volt_min/max to a valid value
misc: mic/scif: fix wrap around tests
misc/bmp085: Enable building as a module
lib/mpi: Endianness fix
fbdev: da8xx-fb: fix videomodes of lcd panels
scsi_dh: force modular build if SCSI is a module
paride: make 'verbose' parameter an 'int' again
regulator: s5m8767: fix get_register() error handling
irqchip/mxs: Fix error check of of_io_request_and_map()
irqchip/sunxi-nmi: Fix error check of of_io_request_and_map()
spi/rockchip: Make sure spi clk is on in rockchip_spi_set_cs
locking/mcs: Fix mcs_spin_lock() ordering
regulator: core: Fix nested locking of supplies
regulator: core: Ensure we lock all regulators
regulator: core: fix regulator_lock_supply regression
Revert "regulator: core: Fix nested locking of supplies"
videobuf2-v4l2: Verify planes array in buffer dequeueing
videobuf2-core: Check user space planes array in dqbuf
USB: usbip: fix potential out-of-bounds write
cgroup: make sure a parent css isn't freed before its children
mm/hwpoison: fix wrong num_poisoned_pages accounting
mm: vmscan: reclaim highmem zone if buffer_heads is over limit
numa: fix /proc/<pid>/numa_maps for THP
mm/huge_memory: replace VM_NO_THP VM_BUG_ON with actual VMA check
memcg: relocate charge moving from ->attach to ->post_attach
cgroup, cpuset: replace cpuset_post_attach_flush() with cgroup_subsys->post_attach callback
slub: clean up code for kmem cgroup support to kmem_cache_free_bulk
workqueue: fix ghost PENDING flag while doing MQ IO
x86/apic: Handle zero vector gracefully in clear_vector_irq()
efi: Expose non-blocking set_variable() wrapper to efivars
efi: Fix out-of-bounds read in variable_matches()
IB/security: Restrict use of the write() interface
IB/mlx5: Expose correct max_sge_rd limit
cxl: Keep IRQ mappings on context teardown
v4l2-dv-timings.h: fix polarity for 4k formats
vb2-memops: Fix over allocation of frame vectors
ASoC: rt5640: Correct the digital interface data select
ASoC: dapm: Make sure we have a card when displaying component widgets
ASoC: ssm4567: Reset device before regcache_sync()
ASoC: s3c24xx: use const snd_soc_component_driver pointer
EDAC: i7core, sb_edac: Don't return NOTIFY_BAD from mce_decoder callback
toshiba_acpi: Fix regression caused by hotkey enabling value
i2c: exynos5: Fix possible ABBA deadlock by keeping I2C clock prepared
i2c: cpm: Fix build break due to incompatible pointer types
perf intel-pt: Fix segfault tracing transactions
drm/i915: Use fw_domains_put_with_fifo() on HSW
drm/i915: Fixup the free space logic in ring_prepare
drm/amdkfd: uninitialized variable in dbgdev_wave_control_set_registers()
drm/i915: skl_update_scaler() wants a rotation bitmask instead of bit number
drm/i915: Cleanup phys status page too
pwm: brcmstb: Fix check of devm_ioremap_resource() return code
drm/dp/mst: Get validated port ref in drm_dp_update_payload_part1()
drm/dp/mst: Restore primary hub guid on resume
drm/dp/mst: Validate port in drm_dp_payload_send_msg()
drm/nouveau/gr/gf100: select a stream master to fixup tfb offset queries
drm: Loongson-3 doesn't fully support wc memory
drm/radeon: fix vertical bars appear on monitor (v2)
drm/radeon: forbid mapping of userptr bo through radeon device file
drm/radeon: fix initial connector audio value
drm/radeon: add a quirk for a XFX R9 270X
drm/amdgpu: fix regression on CIK (v2)
amdgpu/uvd: add uvd fw version for amdgpu
drm/amdgpu: bump the afmt limit for CZ, ST, Polaris
drm/amdgpu: use defines for CRTCs and AMFT blocks
drm/amdgpu: when suspending, if uvd/vce was running. need to cancel delay work.
iommu/dma: Restore scatterlist offsets correctly
iommu/amd: Fix checking of pci dma aliases
pinctrl: single: Fix pcs_parse_bits_in_pinctrl_entry to use __ffs than ffs
pinctrl: mediatek: correct debounce time unit in mtk_gpio_set_debounce
xen kconfig: don't "select INPUT_XEN_KBDDEV_FRONTEND"
Input: pmic8xxx-pwrkey - fix algorithm for converting trigger delay
Input: gtco - fix crash on detecting device without endpoints
netlink: don't send NETLINK_URELEASE for unbound sockets
nl80211: check netlink protocol in socket release notification
powerpc: Update TM user feature bits in scan_features()
powerpc: Update cpu_user_features2 in scan_features()
powerpc: scan_features() updates incorrect bits for REAL_LE
crypto: talitos - fix AEAD tcrypt tests
crypto: talitos - fix crash in talitos_cra_init()
crypto: sha1-mb - use corrcet pointer while completing jobs
crypto: ccp - Prevent information leakage on export
iwlwifi: mvm: fix memory leak in paging
iwlwifi: pcie: lower the debug level for RSA semaphore access
s390/pci: add extra padding to function measurement block
cpufreq: intel_pstate: Fix processing for turbo activation ratio
Revert "drm/amdgpu: disable runtime pm on PX laptops without dGPU power control"
Revert "drm/radeon: disable runtime pm on PX laptops without dGPU power control"
drm/i915: Fix race condition in intel_dp_destroy_mst_connector()
drm/qxl: fix cursor position with non-zero hotspot
drm/nouveau/core: use vzalloc for allocating ramht
futex: Acknowledge a new waiter in counter before plist
futex: Handle unlock_pi race gracefully
asm-generic/futex: Re-enable preemption in futex_atomic_cmpxchg_inatomic()
ALSA: hda - Add dock support for ThinkPad X260
ALSA: pcxhr: Fix missing mutex unlock
ALSA: hda - add PCI ID for Intel Broxton-T
ALSA: hda - Keep powering up ADCs on Cirrus codecs
ALSA: hda/realtek - Add ALC3234 headset mode for Optiplex 9020m
ALSA: hda - Don't trust the reported actual power state
x86 EDAC, sb_edac.c: Repair damage introduced when "fixing" channel address
x86/mm/xen: Suppress hugetlbfs in PV guests
arm64: Update PTE_RDONLY in set_pte_at() for PROT_NONE permission
arm64: Honour !PTE_WRITE in set_pte_at() for kernel mappings
sched/cgroup: Fix/cleanup cgroup teardown/init
dmaengine: pxa_dma: fix the maximum requestor line
dmaengine: hsu: correct use of channel status register
dmaengine: dw: fix master selection
debugfs: Make automount point inodes permanently empty
lib: lz4: fixed zram with lz4 on big endian machines
dm cache metadata: fix cmd_read_lock() acquiring write lock
dm cache metadata: fix READ_LOCK macros and cleanup WRITE_LOCK macros
usb: gadget: f_fs: Fix use-after-free
usb: hcd: out of bounds access in for_each_companion
xhci: fix 10 second timeout on removal of PCI hotpluggable xhci controllers
usb: xhci: fix wild pointers in xhci_mem_cleanup
xhci: resume USB 3 roothub first
usb: xhci: applying XHCI_PME_STUCK_QUIRK to Intel BXT B0 host
assoc_array: don't call compare_object() on a node
ARM: OMAP2+: hwmod: Fix updating of sysconfig register
ARM: OMAP2: Fix up interconnect barrier initialization for DRA7
ARM: mvebu: Correct unit address for linksys
ARM: dts: AM43x-epos: Fix clk parent for synctimer
KVM: arm/arm64: Handle forward time correction gracefully
kvm: x86: do not leak guest xcr0 into host interrupt handlers
x86/mce: Avoid using object after free in genpool
block: loop: fix filesystem corruption in case of aio/dio
block: partition: initialize percpuref before sending out KOBJ_ADD
Conflicts:
arch/arm64/Kconfig
arch/arm64/include/asm/cputype.h
arch/arm64/include/asm/hardirq.h
arch/arm64/include/asm/irq.h
arch/arm64/include/asm/mmu_context.h
arch/arm64/kernel/cpu_errata.c
arch/arm64/kernel/cpuinfo.c
arch/arm64/kernel/setup.c
arch/arm64/kernel/smp.c
arch/arm64/kernel/stacktrace.c
arch/arm64/mm/init.c
arch/arm64/mm/mmu.c
arch/arm64/mm/pageattr.c
mm/memcontrol.c
CRs-Fixed: 1069136
Signed-off-by: Bryan Huntsman <bryanh@codeaurora.org>
Signed-off-by: Runmin Wang <runminw@codeaurora.org>
Change-Id: Ie9a16debd0578331a66947376f3b787a7bb54d65
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SLUB already has a redzone debugging feature. But it is only positioned
at the end of object (aka right redzone) so it cannot catch left oob.
Although current object's right redzone acts as left redzone of next
object, first object in a slab cannot take advantage of this effect.
This patch explicitly adds a left red zone to each object to detect left
oob more precisely.
Background:
Someone complained to me that left OOB doesn't catch even if KASAN is
enabled which does page allocation debugging. That page is out of our
control so it would be allocated when left OOB happens and, in this
case, we can't find OOB. Moreover, SLUB debugging feature can be
enabled without page allocator debugging and, in this case, we will miss
that OOB.
Before trying to implement, I expected that changes would be too
complex, but, it doesn't look that complex to me now. Almost changes
are applied to debug specific functions so I feel okay.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Change-Id: Ib893a17ecabd692e6c402e864196bf89cd6781a5
(cherry picked from commit d86bd1bece6fc41d59253002db5441fe960a37f6)
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
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Under CONFIG_HARDENED_USERCOPY, this adds object size checking to the
SLUB allocator to catch any copies that may span objects. Includes a
redzone handling fix discovered by Michael Ellerman.
Based on code from PaX and grsecurity.
Signed-off-by: Kees Cook <keescook@chromium.org>
Tested-by: Michael Ellerman <mpe@ellerman.id.au>
Reviwed-by: Laura Abbott <labbott@redhat.com>
(cherry picked from commit ed18adc1cdd00a5c55a20fbdaed4804660772281)
Signed-off-by: Alex Shi <alex.shi@linaro.org>
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This reverts commit 9d6fd2c3e9fcfb ("Merge remote-tracking branch
'msm-4.4/tmp-510d0a3f' into msm-4.4"), because it breaks the
dump parsing tools due to kernel can be loaded anywhere in the memory
now and not fixed at linear mapping.
Change-Id: Id416f0a249d803442847d09ac47781147b0d0ee6
Signed-off-by: Trilok Soni <tsoni@codeaurora.org>
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* msm-4.4/tmp-510d0a3f:
Linux 4.4.11
nf_conntrack: avoid kernel pointer value leak in slab name
drm/radeon: fix DP link training issue with second 4K monitor
drm/i915/bdw: Add missing delay during L3 SQC credit programming
drm/i915: Bail out of pipe config compute loop on LPT
drm/radeon: fix PLL sharing on DCE6.1 (v2)
Revert "[media] videobuf2-v4l2: Verify planes array in buffer dequeueing"
Input: max8997-haptic - fix NULL pointer dereference
get_rock_ridge_filename(): handle malformed NM entries
tools lib traceevent: Do not reassign parg after collapse_tree()
qla1280: Don't allocate 512kb of host tags
atomic_open(): fix the handling of create_error
regulator: axp20x: Fix axp22x ldo_io voltage ranges
regulator: s2mps11: Fix invalid selector mask and voltages for buck9
workqueue: fix rebind bound workers warning
ARM: dts: at91: sam9x5: Fix the memory range assigned to the PMC
vfs: rename: check backing inode being equal
vfs: add vfs_select_inode() helper
perf/core: Disable the event on a truncated AUX record
regmap: spmi: Fix regmap_spmi_ext_read in multi-byte case
pinctrl: at91-pio4: fix pull-up/down logic
spi: spi-ti-qspi: Handle truncated frames properly
spi: spi-ti-qspi: Fix FLEN and WLEN settings if bits_per_word is overridden
spi: pxa2xx: Do not detect number of enabled chip selects on Intel SPT
ALSA: hda - Fix broken reconfig
ALSA: hda - Fix white noise on Asus UX501VW headset
ALSA: hda - Fix subwoofer pin on ASUS N751 and N551
ALSA: usb-audio: Yet another Phoneix Audio device quirk
ALSA: usb-audio: Quirk for yet another Phoenix Audio devices (v2)
crypto: testmgr - Use kmalloc memory for RSA input
crypto: hash - Fix page length clamping in hash walk
crypto: qat - fix invalid pf2vf_resp_wq logic
s390/mm: fix asce_bits handling with dynamic pagetable levels
zsmalloc: fix zs_can_compact() integer overflow
ocfs2: fix posix_acl_create deadlock
ocfs2: revert using ocfs2_acl_chmod to avoid inode cluster lock hang
net/route: enforce hoplimit max value
tcp: refresh skb timestamp at retransmit time
net: thunderx: avoid exposing kernel stack
net: fix a kernel infoleak in x25 module
uapi glibc compat: fix compile errors when glibc net/if.h included before linux/if.h MIME-Version: 1.0
bridge: fix igmp / mld query parsing
net: bridge: fix old ioctl unlocked net device walk
VSOCK: do not disconnect socket when peer has shutdown SEND only
net/mlx4_en: Fix endianness bug in IPV6 csum calculation
net: fix infoleak in rtnetlink
net: fix infoleak in llc
net: fec: only clear a queue's work bit if the queue was emptied
netem: Segment GSO packets on enqueue
sch_dsmark: update backlog as well
sch_htb: update backlog as well
net_sched: update hierarchical backlog too
net_sched: introduce qdisc_replace() helper
gre: do not pull header in ICMP error processing
net: Implement net_dbg_ratelimited() for CONFIG_DYNAMIC_DEBUG case
samples/bpf: fix trace_output example
bpf: fix check_map_func_compatibility logic
bpf: fix refcnt overflow
bpf: fix double-fdput in replace_map_fd_with_map_ptr()
net/mlx4_en: fix spurious timestamping callbacks
ipv4/fib: don't warn when primary address is missing if in_dev is dead
net/mlx5e: Fix minimum MTU
net/mlx5e: Device's mtu field is u16 and not int
openvswitch: use flow protocol when recalculating ipv6 checksums
atl2: Disable unimplemented scatter/gather feature
vlan: pull on __vlan_insert_tag error path and fix csum correction
net: use skb_postpush_rcsum instead of own implementations
cdc_mbim: apply "NDP to end" quirk to all Huawei devices
bpf/verifier: reject invalid LD_ABS | BPF_DW instruction
net: sched: do not requeue a NULL skb
packet: fix heap info leak in PACKET_DIAG_MCLIST sock_diag interface
route: do not cache fib route info on local routes with oif
decnet: Do not build routes to devices without decnet private data.
parisc: Use generic extable search and sort routines
arm64: kasan: Use actual memory node when populating the kernel image shadow
arm64: mm: treat memstart_addr as a signed quantity
arm64: lse: deal with clobbered IP registers after branch via PLT
arm64: mm: check at build time that PAGE_OFFSET divides the VA space evenly
arm64: kasan: Fix zero shadow mapping overriding kernel image shadow
arm64: consistently use p?d_set_huge
arm64: fix KASLR boot-time I-cache maintenance
arm64: hugetlb: partial revert of 66b3923a1a0f
arm64: make irq_stack_ptr more robust
arm64: efi: invoke EFI_RNG_PROTOCOL to supply KASLR randomness
efi: stub: use high allocation for converted command line
efi: stub: add implementation of efi_random_alloc()
efi: stub: implement efi_get_random_bytes() based on EFI_RNG_PROTOCOL
arm64: kaslr: randomize the linear region
arm64: add support for kernel ASLR
arm64: add support for building vmlinux as a relocatable PIE binary
arm64: switch to relative exception tables
extable: add support for relative extables to search and sort routines
scripts/sortextable: add support for ET_DYN binaries
arm64: futex.h: Add missing PAN toggling
arm64: make asm/elf.h available to asm files
arm64: avoid dynamic relocations in early boot code
arm64: avoid R_AARCH64_ABS64 relocations for Image header fields
arm64: add support for module PLTs
arm64: move brk immediate argument definitions to separate header
arm64: mm: use bit ops rather than arithmetic in pa/va translations
arm64: mm: only perform memstart_addr sanity check if DEBUG_VM
arm64: User die() instead of panic() in do_page_fault()
arm64: allow kernel Image to be loaded anywhere in physical memory
arm64: defer __va translation of initrd_start and initrd_end
arm64: move kernel image to base of vmalloc area
arm64: kvm: deal with kernel symbols outside of linear mapping
arm64: decouple early fixmap init from linear mapping
arm64: pgtable: implement static [pte|pmd|pud]_offset variants
arm64: introduce KIMAGE_VADDR as the virtual base of the kernel region
arm64: add support for ioremap() block mappings
arm64: prevent potential circular header dependencies in asm/bug.h
of/fdt: factor out assignment of initrd_start/initrd_end
of/fdt: make memblock minimum physical address arch configurable
arm64: Remove the get_thread_info() function
arm64: kernel: Don't toggle PAN on systems with UAO
arm64: cpufeature: Test 'matches' pointer to find the end of the list
arm64: kernel: Add support for User Access Override
arm64: add ARMv8.2 id_aa64mmfr2 boiler plate
arm64: cpufeature: Change read_cpuid() to use sysreg's mrs_s macro
arm64: use local label prefixes for __reg_num symbols
arm64: vdso: Mark vDSO code as read-only
arm64: ubsan: select ARCH_HAS_UBSAN_SANITIZE_ALL
arm64: ptdump: Indicate whether memory should be faulting
arm64: Add support for ARCH_SUPPORTS_DEBUG_PAGEALLOC
arm64: Drop alloc function from create_mapping
arm64: prefetch: add missing #include for spin_lock_prefetch
arm64: lib: patch in prfm for copy_page if requested
arm64: lib: improve copy_page to deal with 128 bytes at a time
arm64: prefetch: add alternative pattern for CPUs without a prefetcher
arm64: prefetch: don't provide spin_lock_prefetch with LSE
arm64: allow vmalloc regions to be set with set_memory_*
arm64: kernel: implement ACPI parking protocol
arm64: mm: create new fine-grained mappings at boot
arm64: ensure _stext and _etext are page-aligned
arm64: mm: allow passing a pgdir to alloc_init_*
arm64: mm: allocate pagetables anywhere
arm64: mm: use fixmap when creating page tables
arm64: mm: add functions to walk tables in fixmap
arm64: mm: add __{pud,pgd}_populate
arm64: mm: avoid redundant __pa(__va(x))
arm64: mm: add functions to walk page tables by PA
arm64: mm: move pte_* macros
arm64: kasan: avoid TLB conflicts
arm64: mm: add code to safely replace TTBR1_EL1
arm64: add function to install the idmap
arm64: unmap idmap earlier
arm64: unify idmap removal
arm64: mm: place empty_zero_page in bss
arm64: mm: specialise pagetable allocators
asm-generic: Fix local variable shadow in __set_fixmap_offset
Eliminate the .eh_frame sections from the aarch64 vmlinux and kernel modules
arm64: Fix an enum typo in mm/dump.c
arm64: kasan: ensure that the KASAN zero page is mapped read-only
arch/arm64/include/asm/pgtable.h: add pmd_mkclean for THP
arm64: hide __efistub_ aliases from kallsyms
Linux 4.4.10
drm/i915/skl: Fix DMC load on Skylake J0 and K0
lib/test-string_helpers.c: fix and improve string_get_size() tests
ACPI / processor: Request native thermal interrupt handling via _OSC
drm/i915: Fake HDMI live status
drm/i915: Make RPS EI/thresholds multiple of 25 on SNB-BDW
drm/i915: Fix eDP low vswing for Broadwell
drm/i915/ddi: Fix eDP VDD handling during booting and suspend/resume
drm/radeon: make sure vertical front porch is at least 1
iio: ak8975: fix maybe-uninitialized warning
iio: ak8975: Fix NULL pointer exception on early interrupt
drm/amdgpu: set metadata pointer to NULL after freeing.
drm/amdgpu: make sure vertical front porch is at least 1
gpu: ipu-v3: Fix imx-ipuv3-crtc module autoloading
nvmem: mxs-ocotp: fix buffer overflow in read
USB: serial: cp210x: add Straizona Focusers device ids
USB: serial: cp210x: add ID for Link ECU
ata: ahci-platform: Add ports-implemented DT bindings.
libahci: save port map for forced port map
powerpc: Fix bad inline asm constraint in create_zero_mask()
ACPICA: Dispatcher: Update thread ID for recursive method calls
x86/sysfb_efi: Fix valid BAR address range check
ARC: Add missing io barriers to io{read,write}{16,32}be()
ARM: cpuidle: Pass on arm_cpuidle_suspend()'s return value
propogate_mnt: Handle the first propogated copy being a slave
fs/pnode.c: treat zero mnt_group_id-s as unequal
x86/tsc: Read all ratio bits from MSR_PLATFORM_INFO
MAINTAINERS: Remove asterisk from EFI directory names
writeback: Fix performance regression in wb_over_bg_thresh()
batman-adv: Reduce refcnt of removed router when updating route
batman-adv: Fix broadcast/ogm queue limit on a removed interface
batman-adv: Check skb size before using encapsulated ETH+VLAN header
batman-adv: fix DAT candidate selection (must use vid)
mm: update min_free_kbytes from khugepaged after core initialization
proc: prevent accessing /proc/<PID>/environ until it's ready
Input: zforce_ts - fix dual touch recognition
HID: Fix boot delay for Creative SB Omni Surround 5.1 with quirk
HID: wacom: Add support for DTK-1651
xen/evtchn: fix ring resize when binding new events
xen/balloon: Fix crash when ballooning on x86 32 bit PAE
xen: Fix page <-> pfn conversion on 32 bit systems
ARM: SoCFPGA: Fix secondary CPU startup in thumb2 kernel
ARM: EXYNOS: Properly skip unitialized parent clock in power domain on
mm/zswap: provide unique zpool name
mm, cma: prevent nr_isolated_* counters from going negative
Minimal fix-up of bad hashing behavior of hash_64()
MD: make bio mergeable
tracing: Don't display trigger file for events that can't be enabled
mac80211: fix statistics leak if dev_alloc_name() fails
ath9k: ar5008_hw_cmn_spur_mitigate: add missing mask_m & mask_p initialisation
lpfc: fix misleading indentation
clk: qcom: msm8960: Fix ce3_src register offset
clk: versatile: sp810: support reentrance
clk: qcom: msm8960: fix ce3_core clk enable register
clk: meson: Fix meson_clk_register_clks() signature type mismatch
clk: rockchip: free memory in error cases when registering clock branches
soc: rockchip: power-domain: fix err handle while probing
clk-divider: make sure read-only dividers do not write to their register
CNS3xxx: Fix PCI cns3xxx_write_config()
mwifiex: fix corner case association failure
ata: ahci_xgene: dereferencing uninitialized pointer in probe
nbd: ratelimit error msgs after socket close
mfd: intel-lpss: Remove clock tree on error path
ipvs: drop first packet to redirect conntrack
ipvs: correct initial offset of Call-ID header search in SIP persistence engine
ipvs: handle ip_vs_fill_iph_skb_off failure
RDMA/iw_cxgb4: Fix bar2 virt addr calculation for T4 chips
Revert: "powerpc/tm: Check for already reclaimed tasks"
arm64: head.S: use memset to clear BSS
efi: stub: define DISABLE_BRANCH_PROFILING for all architectures
arm64: entry: remove pointless SPSR mode check
arm64: mm: move pgd_cache initialisation to pgtable_cache_init
arm64: module: avoid undefined shift behavior in reloc_data()
arm64: module: fix relocation of movz instruction with negative immediate
arm64: traps: address fallout from printk -> pr_* conversion
arm64: ftrace: fix a stack tracer's output under function graph tracer
arm64: pass a task parameter to unwind_frame()
arm64: ftrace: modify a stack frame in a safe way
arm64: remove irq_count and do_softirq_own_stack()
arm64: hugetlb: add support for PTE contiguous bit
arm64: Use PoU cache instr for I/D coherency
arm64: Defer dcache flush in __cpu_copy_user_page
arm64: reduce stack use in irq_handler
arm64: Documentation: add list of software workarounds for errata
arm64: mm: place __cpu_setup in .text
arm64: cmpxchg: Don't incldue linux/mmdebug.h
arm64: mm: fold alternatives into .init
arm64: Remove redundant padding from linker script
arm64: mm: remove pointless PAGE_MASKing
arm64: don't call C code with el0's fp register
arm64: when walking onto the task stack, check sp & fp are in current->stack
arm64: Add this_cpu_ptr() assembler macro for use in entry.S
arm64: irq: fix walking from irq stack to task stack
arm64: Add do_softirq_own_stack() and enable irq_stacks
arm64: Modify stack trace and dump for use with irq_stack
arm64: Store struct thread_info in sp_el0
arm64: Add trace_hardirqs_off annotation in ret_to_user
arm64: ftrace: fix the comments for ftrace_modify_code
arm64: ftrace: stop using kstop_machine to enable/disable tracing
arm64: spinlock: serialise spin_unlock_wait against concurrent lockers
arm64: enable HAVE_IRQ_TIME_ACCOUNTING
arm64: fix COMPAT_SHMLBA definition for large pages
arm64: add __init/__initdata section marker to some functions/variables
arm64: pgtable: implement pte_accessible()
arm64: mm: allow sections for unaligned bases
arm64: mm: detect bad __create_mapping uses
Linux 4.4.9
extcon: max77843: Use correct size for reading the interrupt register
stm class: Select CONFIG_SRCU
megaraid_sas: add missing curly braces in ioctl handler
sunrpc/cache: drop reference when sunrpc_cache_pipe_upcall() detects a race
thermal: rockchip: fix a impossible condition caused by the warning
unbreak allmodconfig KCONFIG_ALLCONFIG=...
jme: Fix device PM wakeup API usage
jme: Do not enable NIC WoL functions on S0
bus: imx-weim: Take the 'status' property value into account
ARM: dts: pxa: fix dma engine node to pxa3xx-nand
ARM: dts: armada-375: use armada-370-sata for SATA
ARM: EXYNOS: select THERMAL_OF
ARM: prima2: always enable reset controller
ARM: OMAP3: Add cpuidle parameters table for omap3430
ext4: fix races of writeback with punch hole and zero range
ext4: fix races between buffered IO and collapse / insert range
ext4: move unlocked dio protection from ext4_alloc_file_blocks()
ext4: fix races between page faults and hole punching
perf stat: Document --detailed option
perf tools: handle spaces in file names obtained from /proc/pid/maps
perf hists browser: Only offer symbol scripting when a symbol is under the cursor
mtd: nand: Drop mtd.owner requirement in nand_scan
mtd: brcmnand: Fix v7.1 register offsets
mtd: spi-nor: remove micron_quad_enable()
serial: sh-sci: Remove cpufreq notifier to fix crash/deadlock
ext4: fix NULL pointer dereference in ext4_mark_inode_dirty()
x86/mm/kmmio: Fix mmiotrace for hugepages
perf evlist: Reference count the cpu and thread maps at set_maps()
drivers/misc/ad525x_dpot: AD5274 fix RDAC read back errors
rtc: max77686: Properly handle regmap_irq_get_virq() error code
rtc: rx8025: remove rv8803 id
rtc: ds1685: passing bogus values to irq_restore
rtc: vr41xx: Wire up alarm_irq_enable
rtc: hym8563: fix invalid year calculation
PM / Domains: Fix removal of a subdomain
PM / OPP: Initialize u_volt_min/max to a valid value
misc: mic/scif: fix wrap around tests
misc/bmp085: Enable building as a module
lib/mpi: Endianness fix
fbdev: da8xx-fb: fix videomodes of lcd panels
scsi_dh: force modular build if SCSI is a module
paride: make 'verbose' parameter an 'int' again
regulator: s5m8767: fix get_register() error handling
irqchip/mxs: Fix error check of of_io_request_and_map()
irqchip/sunxi-nmi: Fix error check of of_io_request_and_map()
spi/rockchip: Make sure spi clk is on in rockchip_spi_set_cs
locking/mcs: Fix mcs_spin_lock() ordering
regulator: core: Fix nested locking of supplies
regulator: core: Ensure we lock all regulators
regulator: core: fix regulator_lock_supply regression
Revert "regulator: core: Fix nested locking of supplies"
videobuf2-v4l2: Verify planes array in buffer dequeueing
videobuf2-core: Check user space planes array in dqbuf
USB: usbip: fix potential out-of-bounds write
cgroup: make sure a parent css isn't freed before its children
mm/hwpoison: fix wrong num_poisoned_pages accounting
mm: vmscan: reclaim highmem zone if buffer_heads is over limit
numa: fix /proc/<pid>/numa_maps for THP
mm/huge_memory: replace VM_NO_THP VM_BUG_ON with actual VMA check
memcg: relocate charge moving from ->attach to ->post_attach
cgroup, cpuset: replace cpuset_post_attach_flush() with cgroup_subsys->post_attach callback
slub: clean up code for kmem cgroup support to kmem_cache_free_bulk
workqueue: fix ghost PENDING flag while doing MQ IO
x86/apic: Handle zero vector gracefully in clear_vector_irq()
efi: Expose non-blocking set_variable() wrapper to efivars
efi: Fix out-of-bounds read in variable_matches()
IB/security: Restrict use of the write() interface
IB/mlx5: Expose correct max_sge_rd limit
cxl: Keep IRQ mappings on context teardown
v4l2-dv-timings.h: fix polarity for 4k formats
vb2-memops: Fix over allocation of frame vectors
ASoC: rt5640: Correct the digital interface data select
ASoC: dapm: Make sure we have a card when displaying component widgets
ASoC: ssm4567: Reset device before regcache_sync()
ASoC: s3c24xx: use const snd_soc_component_driver pointer
EDAC: i7core, sb_edac: Don't return NOTIFY_BAD from mce_decoder callback
toshiba_acpi: Fix regression caused by hotkey enabling value
i2c: exynos5: Fix possible ABBA deadlock by keeping I2C clock prepared
i2c: cpm: Fix build break due to incompatible pointer types
perf intel-pt: Fix segfault tracing transactions
drm/i915: Use fw_domains_put_with_fifo() on HSW
drm/i915: Fixup the free space logic in ring_prepare
drm/amdkfd: uninitialized variable in dbgdev_wave_control_set_registers()
drm/i915: skl_update_scaler() wants a rotation bitmask instead of bit number
drm/i915: Cleanup phys status page too
pwm: brcmstb: Fix check of devm_ioremap_resource() return code
drm/dp/mst: Get validated port ref in drm_dp_update_payload_part1()
drm/dp/mst: Restore primary hub guid on resume
drm/dp/mst: Validate port in drm_dp_payload_send_msg()
drm/nouveau/gr/gf100: select a stream master to fixup tfb offset queries
drm: Loongson-3 doesn't fully support wc memory
drm/radeon: fix vertical bars appear on monitor (v2)
drm/radeon: forbid mapping of userptr bo through radeon device file
drm/radeon: fix initial connector audio value
drm/radeon: add a quirk for a XFX R9 270X
drm/amdgpu: fix regression on CIK (v2)
amdgpu/uvd: add uvd fw version for amdgpu
drm/amdgpu: bump the afmt limit for CZ, ST, Polaris
drm/amdgpu: use defines for CRTCs and AMFT blocks
drm/amdgpu: when suspending, if uvd/vce was running. need to cancel delay work.
iommu/dma: Restore scatterlist offsets correctly
iommu/amd: Fix checking of pci dma aliases
pinctrl: single: Fix pcs_parse_bits_in_pinctrl_entry to use __ffs than ffs
pinctrl: mediatek: correct debounce time unit in mtk_gpio_set_debounce
xen kconfig: don't "select INPUT_XEN_KBDDEV_FRONTEND"
Input: pmic8xxx-pwrkey - fix algorithm for converting trigger delay
Input: gtco - fix crash on detecting device without endpoints
netlink: don't send NETLINK_URELEASE for unbound sockets
nl80211: check netlink protocol in socket release notification
powerpc: Update TM user feature bits in scan_features()
powerpc: Update cpu_user_features2 in scan_features()
powerpc: scan_features() updates incorrect bits for REAL_LE
crypto: talitos - fix AEAD tcrypt tests
crypto: talitos - fix crash in talitos_cra_init()
crypto: sha1-mb - use corrcet pointer while completing jobs
crypto: ccp - Prevent information leakage on export
iwlwifi: mvm: fix memory leak in paging
iwlwifi: pcie: lower the debug level for RSA semaphore access
s390/pci: add extra padding to function measurement block
cpufreq: intel_pstate: Fix processing for turbo activation ratio
Revert "drm/amdgpu: disable runtime pm on PX laptops without dGPU power control"
Revert "drm/radeon: disable runtime pm on PX laptops without dGPU power control"
drm/i915: Fix race condition in intel_dp_destroy_mst_connector()
drm/qxl: fix cursor position with non-zero hotspot
drm/nouveau/core: use vzalloc for allocating ramht
futex: Acknowledge a new waiter in counter before plist
futex: Handle unlock_pi race gracefully
asm-generic/futex: Re-enable preemption in futex_atomic_cmpxchg_inatomic()
ALSA: hda - Add dock support for ThinkPad X260
ALSA: pcxhr: Fix missing mutex unlock
ALSA: hda - add PCI ID for Intel Broxton-T
ALSA: hda - Keep powering up ADCs on Cirrus codecs
ALSA: hda/realtek - Add ALC3234 headset mode for Optiplex 9020m
ALSA: hda - Don't trust the reported actual power state
x86 EDAC, sb_edac.c: Repair damage introduced when "fixing" channel address
x86/mm/xen: Suppress hugetlbfs in PV guests
arm64: Update PTE_RDONLY in set_pte_at() for PROT_NONE permission
arm64: Honour !PTE_WRITE in set_pte_at() for kernel mappings
sched/cgroup: Fix/cleanup cgroup teardown/init
dmaengine: pxa_dma: fix the maximum requestor line
dmaengine: hsu: correct use of channel status register
dmaengine: dw: fix master selection
debugfs: Make automount point inodes permanently empty
lib: lz4: fixed zram with lz4 on big endian machines
dm cache metadata: fix cmd_read_lock() acquiring write lock
dm cache metadata: fix READ_LOCK macros and cleanup WRITE_LOCK macros
usb: gadget: f_fs: Fix use-after-free
usb: hcd: out of bounds access in for_each_companion
xhci: fix 10 second timeout on removal of PCI hotpluggable xhci controllers
usb: xhci: fix wild pointers in xhci_mem_cleanup
xhci: resume USB 3 roothub first
usb: xhci: applying XHCI_PME_STUCK_QUIRK to Intel BXT B0 host
assoc_array: don't call compare_object() on a node
ARM: OMAP2+: hwmod: Fix updating of sysconfig register
ARM: OMAP2: Fix up interconnect barrier initialization for DRA7
ARM: mvebu: Correct unit address for linksys
ARM: dts: AM43x-epos: Fix clk parent for synctimer
KVM: arm/arm64: Handle forward time correction gracefully
kvm: x86: do not leak guest xcr0 into host interrupt handlers
x86/mce: Avoid using object after free in genpool
block: loop: fix filesystem corruption in case of aio/dio
block: partition: initialize percpuref before sending out KOBJ_ADD
Conflicts:
arch/arm64/Kconfig
arch/arm64/include/asm/cputype.h
arch/arm64/include/asm/hardirq.h
arch/arm64/include/asm/irq.h
arch/arm64/kernel/cpu_errata.c
arch/arm64/kernel/cpuinfo.c
arch/arm64/kernel/setup.c
arch/arm64/kernel/smp.c
arch/arm64/kernel/stacktrace.c
arch/arm64/mm/init.c
arch/arm64/mm/mmu.c
arch/arm64/mm/pageattr.c
mm/memcontrol.c
CRs-Fixed: 1054234
Signed-off-by: Trilok Soni <tsoni@codeaurora.org>
Change-Id: I2a7a34631ffee36ce18b9171f16d023be777392f
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commit 376bf125ac781d32e202760ed7deb1ae4ed35d31 upstream.
This change is primarily an attempt to make it easier to realize the
optimizations the compiler performs in-case CONFIG_MEMCG_KMEM is not
enabled.
Performance wise, even when CONFIG_MEMCG_KMEM is compiled in, the
overhead is zero. This is because, as long as no process have enabled
kmem cgroups accounting, the assignment is replaced by asm-NOP
operations. This is possible because memcg_kmem_enabled() uses a
static_key_false() construct.
It also helps readability as it avoid accessing the p[] array like:
p[size - 1] which "expose" that the array is processed backwards inside
helper function build_detached_freelist().
Lastly this also makes the code more robust, in error case like passing
NULL pointers in the array. Which were previously handled before commit
033745189b1b ("slub: add missing kmem cgroup support to
kmem_cache_free_bulk").
Fixes: 033745189b1b ("slub: add missing kmem cgroup support to kmem_cache_free_bulk")
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Vladimir Davydov <vdavydov@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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KASan marks slub objects as redzone and free and the bitmasks for
that region are not cleared until the pages are freed. When
CONFIG_PAGE_POISONING is enabled, as the pages still have special
bitmasks, KAsan report arises during pages poisoning. So mark the
pages as alloc status before poisoning the pages.
==================================================================
BUG: KASan: use after free in memset+0x24/0x44 at addr ffffffc0bb628000
Write of size 4096 by task kworker/u8:0/6
page:ffffffbacc51d900 count:0 mapcount:0 mapping: (null) index:0x0
flags: 0x4000000000000000()
page dumped because: kasan: bad access detected
Call trace:
[<ffffffc00008c010>] dump_backtrace+0x0/0x250
[<ffffffc00008c270>] show_stack+0x10/0x1c
[<ffffffc001b6f9e4>] dump_stack+0x74/0xfc
[<ffffffc0002debf4>] kasan_report_error+0x2b0/0x408
[<ffffffc0002dee28>] kasan_report+0x34/0x40
[<ffffffc0002de240>] __asan_storeN+0x15c/0x168
[<ffffffc0002de47c>] memset+0x20/0x44
[<ffffffc0002d77bc>] kernel_map_pages+0x2e8/0x384
[<ffffffc000266458>] free_pages_prepare+0x340/0x3a0
[<ffffffc0002694cc>] __free_pages_ok+0x20/0x12c
[<ffffffc00026a698>] __free_pages+0x34/0x44
[<ffffffc00026ab3c>] __free_kmem_pages+0x8/0x14
[<ffffffc0002dc3fc>] kfree+0x114/0x254
[<ffffffc000b05748>] devres_free+0x48/0x5c
[<ffffffc000b05824>] devres_destroy+0x10/0x28
[<ffffffc000b05958>] devm_kfree+0x1c/0x3c
Memory state around the buggy address:
ffffffc0bb627f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffffc0bb627f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffffc0bb628000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffffffc0bb628080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffffffc0bb628100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
BUG: KASan: use after free in memset+0x24/0x44 at addr ffffffc0bb2fe000
Write of size 4096 by task swapper/0/1
page:ffffffbacc4fdec0 count:0 mapcount:0 mapping: (null) index:0xffffffc0bb2fe6a0
flags: 0x4000000000000000()
page dumped because: kasan: bad access detected
Call trace:
[<ffffffc00008c010>] dump_backtrace+0x0/0x250
[<ffffffc00008c270>] show_stack+0x10/0x1c
[<ffffffc001b6f9e4>] dump_stack+0x74/0xfc
[<ffffffc0002debf4>] kasan_report_error+0x2b0/0x408
[<ffffffc0002dee28>] kasan_report+0x34/0x40
[<ffffffc0002de240>] __asan_storeN+0x15c/0x168
[<ffffffc0002de47c>] memset+0x20/0x44
[<ffffffc0002d77bc>] kernel_map_pages+0x2e8/0x384
[<ffffffc000266458>] free_pages_prepare+0x340/0x3a0
[<ffffffc0002694cc>] __free_pages_ok+0x20/0x12c
[<ffffffc00026a698>] __free_pages+0x34/0x44
[<ffffffc0002d9c98>] __free_slab+0x15c/0x178
[<ffffffc0002d9d14>] discard_slab+0x60/0x6c
[<ffffffc0002dc034>] __slab_free+0x320/0x340
[<ffffffc0002dc224>] kmem_cache_free+0x1d0/0x25c
[<ffffffc0003bb608>] kernfs_put+0x2a0/0x3d8
Memory state around the buggy address:
ffffffc0bb2fdf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffffffc0bb2fdf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffffffc0bb2fe000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc
^
fffffc0bb2fe080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffffffc0bb2fe100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
Change-Id: Id963b9439685f94a022dcdd60b59aaf126610387
Signed-off-by: Se Wang (Patrick) Oh <sewango@codeaurora.org>
[satyap: trivial merge conflict resolution]
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>
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If the SLUB_DEBUG_PANIC_ON Kconfig option is
selected, also panic for object and slab
errors to allow capturing relevant debug
data.
Change-Id: Idc582ef48d3c0d866fa89cf8660ff0a5402f7e15
Signed-off-by: David Keitel <dkeitel@codeaurora.org>
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Resiliency of slub was added for production systems in an
attempt to restore corruptions and allow production environments
to continue to run.
In debug setups, this may no be desirable. Thus rather than
attempting to restore corrupted bytes in poisoned zones, panic
to attempt to catch more context of what was going on in the
system at the time.
Add the CONFIG_SLUB_DEBUG_PANIC_ON defconfig option to allow
debug builds to turn on this panic option.
Change-Id: I01763e8eea40a4544e9b7e48c4e4d40840b6c82d
Signed-off-by: David Keitel <dkeitel@codeaurora.org>
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Adjust kmem_cache_alloc_bulk API before we have any real users.
Adjust API to return type 'int' instead of previously type 'bool'. This
is done to allow future extension of the bulk alloc API.
A future extension could be to allow SLUB to stop at a page boundary, when
specified by a flag, and then return the number of objects.
The advantage of this approach, would make it easier to make bulk alloc
run without local IRQs disabled. With an approach of cmpxchg "stealing"
the entire c->freelist or page->freelist. To avoid overshooting we would
stop processing at a slab-page boundary. Else we always end up returning
some objects at the cost of another cmpxchg.
To keep compatible with future users of this API linking against an older
kernel when using the new flag, we need to return the number of allocated
objects with this API change.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Vladimir Davydov <vdavydov@virtuozzo.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Initial implementation missed support for kmem cgroup support in
kmem_cache_free_bulk() call, add this.
If CONFIG_MEMCG_KMEM is not enabled, the compiler should be smart enough
to not add any asm code.
Incoming bulk free objects can belong to different kmem cgroups, and
object free call can happen at a later point outside memcg context. Thus,
we need to keep the orig kmem_cache, to correctly verify if a memcg object
match against its "root_cache" (s->memcg_params.root_cache).
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Reviewed-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
The call slab_pre_alloc_hook() interacts with kmemgc and is not allowed to
be called several times inside the bulk alloc for loop, due to the call to
memcg_kmem_get_cache().
This would result in hitting the VM_BUG_ON in __memcg_kmem_get_cache.
As suggested by Vladimir Davydov, change slab_post_alloc_hook() to be able
to handle an array of objects.
A subtle detail is, loop iterator "i" in slab_post_alloc_hook() must have
same type (size_t) as size argument. This helps the compiler to easier
realize that it can remove the loop, when all debug statements inside loop
evaluates to nothing. Note, this is only an issue because the kernel is
compiled with GCC option: -fno-strict-overflow
In slab_alloc_node() the compiler inlines and optimizes the invocation of
slab_post_alloc_hook(s, flags, 1, &object) by removing the loop and access
object directly.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Reported-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Suggested-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Reviewed-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
This change focus on improving the speed of object freeing in the
"slowpath" of kmem_cache_free_bulk.
The calls slab_free (fastpath) and __slab_free (slowpath) have been
extended with support for bulk free, which amortize the overhead of
the (locked) cmpxchg_double.
To use the new bulking feature, we build what I call a detached
freelist. The detached freelist takes advantage of three properties:
1) the free function call owns the object that is about to be freed,
thus writing into this memory is synchronization-free.
2) many freelist's can co-exist side-by-side in the same slab-page
each with a separate head pointer.
3) it is the visibility of the head pointer that needs synchronization.
Given these properties, the brilliant part is that the detached
freelist can be constructed without any need for synchronization. The
freelist is constructed directly in the page objects, without any
synchronization needed. The detached freelist is allocated on the
stack of the function call kmem_cache_free_bulk. Thus, the freelist
head pointer is not visible to other CPUs.
All objects in a SLUB freelist must belong to the same slab-page.
Thus, constructing the detached freelist is about matching objects
that belong to the same slab-page. The bulk free array is scanned is
a progressive manor with a limited look-ahead facility.
Kmem debug support is handled in call of slab_free().
Notice kmem_cache_free_bulk no longer need to disable IRQs. This
only slowed down single free bulk with approx 3 cycles.
Performance data:
Benchmarked[1] obj size 256 bytes on CPU i7-4790K @ 4.00GHz
SLUB fastpath single object quick reuse: 47 cycles(tsc) 11.931 ns
To get stable and comparable numbers, the kernel have been booted with
"slab_merge" (this also improve performance for larger bulk sizes).
Performance data, compared against fallback bulking:
bulk - fallback bulk - improvement with this patch
1 - 62 cycles(tsc) 15.662 ns - 49 cycles(tsc) 12.407 ns- improved 21.0%
2 - 55 cycles(tsc) 13.935 ns - 30 cycles(tsc) 7.506 ns - improved 45.5%
3 - 53 cycles(tsc) 13.341 ns - 23 cycles(tsc) 5.865 ns - improved 56.6%
4 - 52 cycles(tsc) 13.081 ns - 20 cycles(tsc) 5.048 ns - improved 61.5%
8 - 50 cycles(tsc) 12.627 ns - 18 cycles(tsc) 4.659 ns - improved 64.0%
16 - 49 cycles(tsc) 12.412 ns - 17 cycles(tsc) 4.495 ns - improved 65.3%
30 - 49 cycles(tsc) 12.484 ns - 18 cycles(tsc) 4.533 ns - improved 63.3%
32 - 50 cycles(tsc) 12.627 ns - 18 cycles(tsc) 4.707 ns - improved 64.0%
34 - 96 cycles(tsc) 24.243 ns - 23 cycles(tsc) 5.976 ns - improved 76.0%
48 - 83 cycles(tsc) 20.818 ns - 21 cycles(tsc) 5.329 ns - improved 74.7%
64 - 74 cycles(tsc) 18.700 ns - 20 cycles(tsc) 5.127 ns - improved 73.0%
128 - 90 cycles(tsc) 22.734 ns - 27 cycles(tsc) 6.833 ns - improved 70.0%
158 - 99 cycles(tsc) 24.776 ns - 30 cycles(tsc) 7.583 ns - improved 69.7%
250 - 104 cycles(tsc) 26.089 ns - 37 cycles(tsc) 9.280 ns - improved 64.4%
Performance data, compared current in-kernel bulking:
bulk - curr in-kernel - improvement with this patch
1 - 46 cycles(tsc) - 49 cycles(tsc) - improved (cycles:-3) -6.5%
2 - 27 cycles(tsc) - 30 cycles(tsc) - improved (cycles:-3) -11.1%
3 - 21 cycles(tsc) - 23 cycles(tsc) - improved (cycles:-2) -9.5%
4 - 18 cycles(tsc) - 20 cycles(tsc) - improved (cycles:-2) -11.1%
8 - 17 cycles(tsc) - 18 cycles(tsc) - improved (cycles:-1) -5.9%
16 - 18 cycles(tsc) - 17 cycles(tsc) - improved (cycles: 1) 5.6%
30 - 18 cycles(tsc) - 18 cycles(tsc) - improved (cycles: 0) 0.0%
32 - 18 cycles(tsc) - 18 cycles(tsc) - improved (cycles: 0) 0.0%
34 - 78 cycles(tsc) - 23 cycles(tsc) - improved (cycles:55) 70.5%
48 - 60 cycles(tsc) - 21 cycles(tsc) - improved (cycles:39) 65.0%
64 - 49 cycles(tsc) - 20 cycles(tsc) - improved (cycles:29) 59.2%
128 - 69 cycles(tsc) - 27 cycles(tsc) - improved (cycles:42) 60.9%
158 - 79 cycles(tsc) - 30 cycles(tsc) - improved (cycles:49) 62.0%
250 - 86 cycles(tsc) - 37 cycles(tsc) - improved (cycles:49) 57.0%
Performance with normal SLUB merging is significantly slower for
larger bulking. This is believed to (primarily) be an effect of not
having to share the per-CPU data-structures, as tuning per-CPU size
can achieve similar performance.
bulk - slab_nomerge - normal SLUB merge
1 - 49 cycles(tsc) - 49 cycles(tsc) - merge slower with cycles:0
2 - 30 cycles(tsc) - 30 cycles(tsc) - merge slower with cycles:0
3 - 23 cycles(tsc) - 23 cycles(tsc) - merge slower with cycles:0
4 - 20 cycles(tsc) - 20 cycles(tsc) - merge slower with cycles:0
8 - 18 cycles(tsc) - 18 cycles(tsc) - merge slower with cycles:0
16 - 17 cycles(tsc) - 17 cycles(tsc) - merge slower with cycles:0
30 - 18 cycles(tsc) - 23 cycles(tsc) - merge slower with cycles:5
32 - 18 cycles(tsc) - 22 cycles(tsc) - merge slower with cycles:4
34 - 23 cycles(tsc) - 22 cycles(tsc) - merge slower with cycles:-1
48 - 21 cycles(tsc) - 22 cycles(tsc) - merge slower with cycles:1
64 - 20 cycles(tsc) - 48 cycles(tsc) - merge slower with cycles:28
128 - 27 cycles(tsc) - 57 cycles(tsc) - merge slower with cycles:30
158 - 30 cycles(tsc) - 59 cycles(tsc) - merge slower with cycles:29
250 - 37 cycles(tsc) - 56 cycles(tsc) - merge slower with cycles:19
Joint work with Alexander Duyck.
[1] https://github.com/netoptimizer/prototype-kernel/blob/master/kernel/mm/slab_bulk_test01.c
[akpm@linux-foundation.org: BUG_ON -> WARN_ON;return]
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Make it possible to free a freelist with several objects by adjusting API
of slab_free() and __slab_free() to have head, tail and an objects counter
(cnt).
Tail being NULL indicate single object free of head object. This allow
compiler inline constant propagation in slab_free() and
slab_free_freelist_hook() to avoid adding any overhead in case of single
object free.
This allows a freelist with several objects (all within the same
slab-page) to be free'ed using a single locked cmpxchg_double in
__slab_free() and with an unlocked cmpxchg_double in slab_free().
Object debugging on the free path is also extended to handle these
freelists. When CONFIG_SLUB_DEBUG is enabled it will also detect if
objects don't belong to the same slab-page.
These changes are needed for the next patch to bulk free the detached
freelists it introduces and constructs.
Micro benchmarking showed no performance reduction due to this change,
when debugging is turned off (compiled with CONFIG_SLUB_DEBUG).
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
The #ifdef of CONFIG_SLUB_DEBUG is located very far from the associated
#else. For readability mark it with a comment.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Use the new function that can do allocation while interrupts are disabled.
Avoids irq on/off sequences.
Signed-off-by: Christoph Lameter <cl@linux.com>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Bulk alloc needs a function like that because it enables interrupts before
calling __slab_alloc which promptly disables them again using the expensive
local_irq_save().
Signed-off-by: Christoph Lameter <cl@linux.com>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
We have properly typed page->rcu_head, no need to cast page->lru.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
sleep and avoiding waking kswapd
__GFP_WAIT has been used to identify atomic context in callers that hold
spinlocks or are in interrupts. They are expected to be high priority and
have access one of two watermarks lower than "min" which can be referred
to as the "atomic reserve". __GFP_HIGH users get access to the first
lower watermark and can be called the "high priority reserve".
Over time, callers had a requirement to not block when fallback options
were available. Some have abused __GFP_WAIT leading to a situation where
an optimisitic allocation with a fallback option can access atomic
reserves.
This patch uses __GFP_ATOMIC to identify callers that are truely atomic,
cannot sleep and have no alternative. High priority users continue to use
__GFP_HIGH. __GFP_DIRECT_RECLAIM identifies callers that can sleep and
are willing to enter direct reclaim. __GFP_KSWAPD_RECLAIM to identify
callers that want to wake kswapd for background reclaim. __GFP_WAIT is
redefined as a caller that is willing to enter direct reclaim and wake
kswapd for background reclaim.
This patch then converts a number of sites
o __GFP_ATOMIC is used by callers that are high priority and have memory
pools for those requests. GFP_ATOMIC uses this flag.
o Callers that have a limited mempool to guarantee forward progress clear
__GFP_DIRECT_RECLAIM but keep __GFP_KSWAPD_RECLAIM. bio allocations fall
into this category where kswapd will still be woken but atomic reserves
are not used as there is a one-entry mempool to guarantee progress.
o Callers that are checking if they are non-blocking should use the
helper gfpflags_allow_blocking() where possible. This is because
checking for __GFP_WAIT as was done historically now can trigger false
positives. Some exceptions like dm-crypt.c exist where the code intent
is clearer if __GFP_DIRECT_RECLAIM is used instead of the helper due to
flag manipulations.
o Callers that built their own GFP flags instead of starting with GFP_KERNEL
and friends now also need to specify __GFP_KSWAPD_RECLAIM.
The first key hazard to watch out for is callers that removed __GFP_WAIT
and was depending on access to atomic reserves for inconspicuous reasons.
In some cases it may be appropriate for them to use __GFP_HIGH.
The second key hazard is callers that assembled their own combination of
GFP flags instead of starting with something like GFP_KERNEL. They may
now wish to specify __GFP_KSWAPD_RECLAIM. It's almost certainly harmless
if it's missed in most cases as other activity will wake kswapd.
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Vitaly Wool <vitalywool@gmail.com>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
It's recommended to have slub's user tracking enabled with CONFIG_KASAN,
because:
a) User tracking disables slab merging which improves
detecting out-of-bounds accesses.
b) User tracking metadata acts as redzone which also improves
detecting out-of-bounds accesses.
c) User tracking provides additional information about object.
This information helps to understand bugs.
Currently it is not enabled by default. Besides recompiling the kernel
with KASAN and reinstalling it, user also have to change the boot cmdline,
which is not very handy.
Enable slub user tracking by default with KASAN=y, since there is no good
reason to not do this.
[akpm@linux-foundation.org: little fixes, per David]
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
We have memcg_kmem_charge and memcg_kmem_uncharge methods for charging and
uncharging kmem pages to memcg, but currently they are not used for
charging slab pages (i.e. they are only used for charging pages allocated
with alloc_kmem_pages). The only reason why the slab subsystem uses
special helpers, memcg_charge_slab and memcg_uncharge_slab, is that it
needs to charge to the memcg of kmem cache while memcg_charge_kmem charges
to the memcg that the current task belongs to.
To remove this diversity, this patch adds an extra argument to
__memcg_kmem_charge that can be a pointer to a memcg or NULL. If it is
not NULL, the function tries to charge to the memcg it points to,
otherwise it charge to the current context. Next, it makes the slab
subsystem use this function to charge slab pages.
Since memcg_charge_kmem and memcg_uncharge_kmem helpers are now used only
in __memcg_kmem_charge and __memcg_kmem_uncharge, they are inlined. Since
__memcg_kmem_charge stores a pointer to the memcg in the page struct, we
don't need memcg_uncharge_slab anymore and can use free_kmem_pages.
Besides, one can now detect which memcg a slab page belongs to by reading
/proc/kpagecgroup.
Note, this patch switches slab to charge-after-alloc design. Since this
design is already used for all other memcg charges, it should not make any
difference.
[hannes@cmpxchg.org: better to have an outer function than a magic parameter for the memcg lookup]
Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
In slub_order(), the order starts from max(min_order,
get_order(min_objects * size)). When (min_objects * size) has different
order from (min_objects * size + reserved), it will skip this order via a
check in the loop.
This patch optimizes this a little by calculating the start order with
`reserved' in consideration and removing the check in loop.
Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
get_order() is more easy to understand.
This patch just replaces it.
Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
In calculate_order(), it tries to calculate the best order by adjusting
the fraction and min_objects. On each iteration on min_objects, fraction
iterates on 16, 8, 4. Which means the acceptable waste increases with
1/16, 1/8, 1/4.
This patch corrects the comment according to the code.
Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
alloc_pages_exact_node() was introduced in commit 6484eb3e2a81 ("page
allocator: do not check NUMA node ID when the caller knows the node is
valid") as an optimized variant of alloc_pages_node(), that doesn't
fallback to current node for nid == NUMA_NO_NODE. Unfortunately the
name of the function can easily suggest that the allocation is
restricted to the given node and fails otherwise. In truth, the node is
only preferred, unless __GFP_THISNODE is passed among the gfp flags.
The misleading name has lead to mistakes in the past, see for example
commits 5265047ac301 ("mm, thp: really limit transparent hugepage
allocation to local node") and b360edb43f8e ("mm, mempolicy:
migrate_to_node should only migrate to node").
Another issue with the name is that there's a family of
alloc_pages_exact*() functions where 'exact' means exact size (instead
of page order), which leads to more confusion.
To prevent further mistakes, this patch effectively renames
alloc_pages_exact_node() to __alloc_pages_node() to better convey that
it's an optimized variant of alloc_pages_node() not intended for general
usage. Both functions get described in comments.
It has been also considered to really provide a convenience function for
allocations restricted to a node, but the major opinion seems to be that
__GFP_THISNODE already provides that functionality and we shouldn't
duplicate the API needlessly. The number of users would be small
anyway.
Existing callers of alloc_pages_exact_node() are simply converted to
call __alloc_pages_node(), with the exception of sba_alloc_coherent()
which open-codes the check for NUMA_NO_NODE, so it is converted to use
alloc_pages_node() instead. This means it no longer performs some
VM_BUG_ON checks, and since the current check for nid in
alloc_pages_node() uses a 'nid < 0' comparison (which includes
NUMA_NO_NODE), it may hide wrong values which would be previously
exposed.
Both differences will be rectified by the next patch.
To sum up, this patch makes no functional changes, except temporarily
hiding potentially buggy callers. Restricting the checks in
alloc_pages_node() is left for the next patch which can in turn expose
more existing buggy callers.
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Robin Holt <robinmholt@gmail.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Christoph Lameter <cl@linux.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Cc: Mel Gorman <mgorman@suse.de>
Cc: David Rientjes <rientjes@google.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Cliff Whickman <cpw@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Description is almost copied from commit fb05e7a89f50 ("net: don't wait
for order-3 page allocation").
I saw excessive direct memory reclaim/compaction triggered by slub. This
causes performance issues and add latency. Slub uses high-order
allocation to reduce internal fragmentation and management overhead. But,
direct memory reclaim/compaction has high overhead and the benefit of
high-order allocation can't compensate the overhead of both work.
This patch makes auxiliary high-order allocation atomic. If there is no
memory pressure and memory isn't fragmented, the alloction will still
success, so we don't sacrifice high-order allocation's benefit here. If
the atomic allocation fails, direct memory reclaim/compaction will not be
triggered, allocation fallback to low-order immediately, hence the direct
memory reclaim/compaction overhead is avoided. In the allocation failure
case, kswapd is waken up and trying to make high-order freepages, so
allocation could success next time.
Following is the test to measure effect of this patch.
System: QEMU, CPU 8, 512 MB
Mem: 25% memory is allocated at random position to make fragmentation.
Memory-hogger occupies 150 MB memory.
Workload: hackbench -g 20 -l 1000
Average result by 10 runs (Base va Patched)
elapsed_time(s): 4.3468 vs 2.9838
compact_stall: 461.7 vs 73.6
pgmigrate_success: 28315.9 vs 7256.1
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Shaohua Li <shli@fb.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
sysfs_slab_add() shouldn't call kobject_put at error path: this puts last
reference of kmem-cache kobject and frees it. Kmem cache will be freed
second time at error path in kmem_cache_create().
For example this happens when slub debug was enabled in runtime and
somebody creates new kmem cache:
# echo 1 | tee /sys/kernel/slab/*/sanity_checks
# modprobe configfs
"configfs_dir_cache" cannot be merged because existing slab have debug and
cannot create new slab because unique name ":t-0000096" already taken.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Initializing a new slab can introduce rather large latencies because most
of the initialization runs always with interrupts disabled.
There is no point in doing so. The newly allocated slab is not visible
yet, so there is no reason to protect it against concurrent alloc/free.
Move the expensive parts of the initialization into allocate_slab(), so
for all allocations with GFP_WAIT set, interrupts are enabled.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Per request of Joonsoo Kim adding kmem debug support.
I've tested that when debugging is disabled, then there is almost no
performance impact as this code basically gets removed by the compiler.
Need some guidance in enabling and testing this.
bulk- PREVIOUS - THIS-PATCH
1 - 43 cycles(tsc) 10.811 ns - 44 cycles(tsc) 11.236 ns improved -2.3%
2 - 27 cycles(tsc) 6.867 ns - 28 cycles(tsc) 7.019 ns improved -3.7%
3 - 21 cycles(tsc) 5.496 ns - 22 cycles(tsc) 5.526 ns improved -4.8%
4 - 24 cycles(tsc) 6.038 ns - 19 cycles(tsc) 4.786 ns improved 20.8%
8 - 17 cycles(tsc) 4.280 ns - 18 cycles(tsc) 4.572 ns improved -5.9%
16 - 17 cycles(tsc) 4.483 ns - 18 cycles(tsc) 4.658 ns improved -5.9%
30 - 18 cycles(tsc) 4.531 ns - 18 cycles(tsc) 4.568 ns improved 0.0%
32 - 58 cycles(tsc) 14.586 ns - 65 cycles(tsc) 16.454 ns improved -12.1%
34 - 53 cycles(tsc) 13.391 ns - 63 cycles(tsc) 15.932 ns improved -18.9%
48 - 65 cycles(tsc) 16.268 ns - 50 cycles(tsc) 12.506 ns improved 23.1%
64 - 53 cycles(tsc) 13.440 ns - 63 cycles(tsc) 15.929 ns improved -18.9%
128 - 79 cycles(tsc) 19.899 ns - 86 cycles(tsc) 21.583 ns improved -8.9%
158 - 90 cycles(tsc) 22.732 ns - 90 cycles(tsc) 22.552 ns improved 0.0%
250 - 95 cycles(tsc) 23.916 ns - 98 cycles(tsc) 24.589 ns improved -3.2%
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
This implements SLUB specific kmem_cache_free_bulk(). SLUB allocator now
both have bulk alloc and free implemented.
Choose to reenable local IRQs while calling slowpath __slab_free(). In
worst case, where all objects hit slowpath call, the performance should
still be faster than fallback function __kmem_cache_free_bulk(), because
local_irq_{disable+enable} is very fast (7-cycles), while the fallback
invokes this_cpu_cmpxchg() which is slightly slower (9-cycles).
Nitpicking, this should be faster for N>=4, due to the entry cost of
local_irq_{disable+enable}.
Do notice that the save+restore variant is very expensive, this is key to
why this optimization works.
CPU: i7-4790K CPU @ 4.00GHz
* local_irq_{disable,enable}: 7 cycles(tsc) - 1.821 ns
* local_irq_{save,restore} : 37 cycles(tsc) - 9.443 ns
Measurements on CPU CPU i7-4790K @ 4.00GHz
Baseline normal fastpath (alloc+free cost): 43 cycles(tsc) 10.834 ns
Bulk- fallback - this-patch
1 - 58 cycles(tsc) 14.542 ns - 43 cycles(tsc) 10.811 ns improved 25.9%
2 - 50 cycles(tsc) 12.659 ns - 27 cycles(tsc) 6.867 ns improved 46.0%
3 - 48 cycles(tsc) 12.168 ns - 21 cycles(tsc) 5.496 ns improved 56.2%
4 - 47 cycles(tsc) 11.987 ns - 24 cycles(tsc) 6.038 ns improved 48.9%
8 - 46 cycles(tsc) 11.518 ns - 17 cycles(tsc) 4.280 ns improved 63.0%
16 - 45 cycles(tsc) 11.366 ns - 17 cycles(tsc) 4.483 ns improved 62.2%
30 - 45 cycles(tsc) 11.433 ns - 18 cycles(tsc) 4.531 ns improved 60.0%
32 - 75 cycles(tsc) 18.983 ns - 58 cycles(tsc) 14.586 ns improved 22.7%
34 - 71 cycles(tsc) 17.940 ns - 53 cycles(tsc) 13.391 ns improved 25.4%
48 - 80 cycles(tsc) 20.077 ns - 65 cycles(tsc) 16.268 ns improved 18.8%
64 - 71 cycles(tsc) 17.799 ns - 53 cycles(tsc) 13.440 ns improved 25.4%
128 - 91 cycles(tsc) 22.980 ns - 79 cycles(tsc) 19.899 ns improved 13.2%
158 - 100 cycles(tsc) 25.241 ns - 90 cycles(tsc) 22.732 ns improved 10.0%
250 - 102 cycles(tsc) 25.583 ns - 95 cycles(tsc) 23.916 ns improved 6.9%
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Call slowpath __slab_alloc() from within the bulk loop, as the side-effect
of this call likely repopulates c->freelist.
Choose to reenable local IRQs while calling slowpath.
Saving some optimizations for later. E.g. it is possible to extract
parts of __slab_alloc() and avoid the unnecessary and expensive (37
cycles) local_irq_{save,restore}. For now, be happy calling
__slab_alloc() this lower icache impact of this func and I don't have to
worry about correctness.
Measurements on CPU CPU i7-4790K @ 4.00GHz
Baseline normal fastpath (alloc+free cost): 42 cycles(tsc) 10.601 ns
Bulk- fallback - this-patch
1 - 58 cycles(tsc) 14.516 ns - 49 cycles(tsc) 12.459 ns improved 15.5%
2 - 51 cycles(tsc) 12.930 ns - 38 cycles(tsc) 9.605 ns improved 25.5%
3 - 49 cycles(tsc) 12.274 ns - 34 cycles(tsc) 8.525 ns improved 30.6%
4 - 48 cycles(tsc) 12.058 ns - 32 cycles(tsc) 8.036 ns improved 33.3%
8 - 46 cycles(tsc) 11.609 ns - 31 cycles(tsc) 7.756 ns improved 32.6%
16 - 45 cycles(tsc) 11.451 ns - 32 cycles(tsc) 8.148 ns improved 28.9%
30 - 79 cycles(tsc) 19.865 ns - 68 cycles(tsc) 17.164 ns improved 13.9%
32 - 76 cycles(tsc) 19.212 ns - 66 cycles(tsc) 16.584 ns improved 13.2%
34 - 74 cycles(tsc) 18.600 ns - 63 cycles(tsc) 15.954 ns improved 14.9%
48 - 88 cycles(tsc) 22.092 ns - 77 cycles(tsc) 19.373 ns improved 12.5%
64 - 80 cycles(tsc) 20.043 ns - 68 cycles(tsc) 17.188 ns improved 15.0%
128 - 99 cycles(tsc) 24.818 ns - 89 cycles(tsc) 22.404 ns improved 10.1%
158 - 99 cycles(tsc) 24.977 ns - 92 cycles(tsc) 23.089 ns improved 7.1%
250 - 106 cycles(tsc) 26.552 ns - 99 cycles(tsc) 24.785 ns improved 6.6%
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
First piece: acceleration of retrieval of per cpu objects
If we are allocating lots of objects then it is advantageous to disable
interrupts and avoid the this_cpu_cmpxchg() operation to get these objects
faster.
Note that we cannot do the fast operation if debugging is enabled, because
we would have to add extra code to do all the debugging checks. And it
would not be fast anyway.
Note also that the requirement of having interrupts disabled avoids having
to do processor flag operations.
Allocate as many objects as possible in the fast way and then fall back to
the generic implementation for the rest of the objects.
Measurements on CPU CPU i7-4790K @ 4.00GHz
Baseline normal fastpath (alloc+free cost): 42 cycles(tsc) 10.554 ns
Bulk- fallback - this-patch
1 - 57 cycles(tsc) 14.432 ns - 48 cycles(tsc) 12.155 ns improved 15.8%
2 - 50 cycles(tsc) 12.746 ns - 37 cycles(tsc) 9.390 ns improved 26.0%
3 - 48 cycles(tsc) 12.180 ns - 33 cycles(tsc) 8.417 ns improved 31.2%
4 - 48 cycles(tsc) 12.015 ns - 32 cycles(tsc) 8.045 ns improved 33.3%
8 - 46 cycles(tsc) 11.526 ns - 30 cycles(tsc) 7.699 ns improved 34.8%
16 - 45 cycles(tsc) 11.418 ns - 32 cycles(tsc) 8.205 ns improved 28.9%
30 - 80 cycles(tsc) 20.246 ns - 73 cycles(tsc) 18.328 ns improved 8.8%
32 - 79 cycles(tsc) 19.946 ns - 72 cycles(tsc) 18.208 ns improved 8.9%
34 - 78 cycles(tsc) 19.659 ns - 71 cycles(tsc) 17.987 ns improved 9.0%
48 - 86 cycles(tsc) 21.516 ns - 82 cycles(tsc) 20.566 ns improved 4.7%
64 - 93 cycles(tsc) 23.423 ns - 89 cycles(tsc) 22.480 ns improved 4.3%
128 - 100 cycles(tsc) 25.170 ns - 99 cycles(tsc) 24.871 ns improved 1.0%
158 - 102 cycles(tsc) 25.549 ns - 101 cycles(tsc) 25.375 ns improved 1.0%
250 - 101 cycles(tsc) 25.344 ns - 100 cycles(tsc) 25.182 ns improved 1.0%
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Add the basic infrastructure for alloc/free operations on pointer arrays.
It includes a generic function in the common slab code that is used in
this infrastructure patch to create the unoptimized functionality for slab
bulk operations.
Allocators can then provide optimized allocation functions for situations
in which large numbers of objects are needed. These optimization may
avoid taking locks repeatedly and bypass metadata creation if all objects
in slab pages can be used to provide the objects required.
Allocators can extend the skeletons provided and add their own code to the
bulk alloc and free functions. They can keep the generic allocation and
freeing and just fall back to those if optimizations would not work (like
for example when debugging is on).
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
With this patchset the SLUB allocator now has both bulk alloc and free
implemented.
This patchset mostly optimizes the "fastpath" where objects are available
on the per CPU fastpath page. This mostly amortize the less-heavy
none-locked cmpxchg_double used on fastpath.
The "fallback" bulking (e.g __kmem_cache_free_bulk) provides a good basis
for comparison. Measurements[1] of the fallback functions
__kmem_cache_{free,alloc}_bulk have been copied from slab_common.c and
forced "noinline" to force a function call like slab_common.c.
Measurements on CPU CPU i7-4790K @ 4.00GHz
Baseline normal fastpath (alloc+free cost): 42 cycles(tsc) 10.601 ns
Measurements last-patch with disabled debugging:
Bulk- fallback - this-patch
1 - 57 cycles(tsc) 14.448 ns - 44 cycles(tsc) 11.236 ns improved 22.8%
2 - 51 cycles(tsc) 12.768 ns - 28 cycles(tsc) 7.019 ns improved 45.1%
3 - 48 cycles(tsc) 12.232 ns - 22 cycles(tsc) 5.526 ns improved 54.2%
4 - 48 cycles(tsc) 12.025 ns - 19 cycles(tsc) 4.786 ns improved 60.4%
8 - 46 cycles(tsc) 11.558 ns - 18 cycles(tsc) 4.572 ns improved 60.9%
16 - 45 cycles(tsc) 11.458 ns - 18 cycles(tsc) 4.658 ns improved 60.0%
30 - 45 cycles(tsc) 11.499 ns - 18 cycles(tsc) 4.568 ns improved 60.0%
32 - 79 cycles(tsc) 19.917 ns - 65 cycles(tsc) 16.454 ns improved 17.7%
34 - 78 cycles(tsc) 19.655 ns - 63 cycles(tsc) 15.932 ns improved 19.2%
48 - 68 cycles(tsc) 17.049 ns - 50 cycles(tsc) 12.506 ns improved 26.5%
64 - 80 cycles(tsc) 20.009 ns - 63 cycles(tsc) 15.929 ns improved 21.3%
128 - 94 cycles(tsc) 23.749 ns - 86 cycles(tsc) 21.583 ns improved 8.5%
158 - 97 cycles(tsc) 24.299 ns - 90 cycles(tsc) 22.552 ns improved 7.2%
250 - 102 cycles(tsc) 25.681 ns - 98 cycles(tsc) 24.589 ns improved 3.9%
Benchmarking shows impressive improvements in the "fastpath" with a small
number of objects in the working set. Once the working set increases,
resulting in activating the "slowpath" (that contains the heavier locked
cmpxchg_double) the improvement decreases.
I'm currently working on also optimizing the "slowpath" (as network stack
use-case hits this), but this patchset should provide a good foundation
for further improvements. Rest of my patch queue in this area needs some
more work, but preliminary results are good. I'm attending Netfilter
Workshop[2] next week, and I'll hopefully return working on further
improvements in this area.
This patch (of 6):
s/succedd/succeed/
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Commit c48a11c7ad26 ("netvm: propagate page->pfmemalloc to skb") added
checks for page->pfmemalloc to __skb_fill_page_desc():
if (page->pfmemalloc && !page->mapping)
skb->pfmemalloc = true;
It assumes page->mapping == NULL implies that page->pfmemalloc can be
trusted. However, __delete_from_page_cache() can set set page->mapping
to NULL and leave page->index value alone. Due to being in union, a
non-zero page->index will be interpreted as true page->pfmemalloc.
So the assumption is invalid if the networking code can see such a page.
And it seems it can. We have encountered this with a NFS over loopback
setup when such a page is attached to a new skbuf. There is no copying
going on in this case so the page confuses __skb_fill_page_desc which
interprets the index as pfmemalloc flag and the network stack drops
packets that have been allocated using the reserves unless they are to
be queued on sockets handling the swapping which is the case here and
that leads to hangs when the nfs client waits for a response from the
server which has been dropped and thus never arrive.
The struct page is already heavily packed so rather than finding another
hole to put it in, let's do a trick instead. We can reuse the index
again but define it to an impossible value (-1UL). This is the page
index so it should never see the value that large. Replace all direct
users of page->pfmemalloc by page_is_pfmemalloc which will hide this
nastiness from unspoiled eyes.
The information will get lost if somebody wants to use page->index
obviously but that was the case before and the original code expected
that the information should be persisted somewhere else if that is
really needed (e.g. what SLAB and SLUB do).
[akpm@linux-foundation.org: fix blooper in slub]
Fixes: c48a11c7ad26 ("netvm: propagate page->pfmemalloc to skb")
Signed-off-by: Michal Hocko <mhocko@suse.com>
Debugged-by: Vlastimil Babka <vbabka@suse.com>
Debugged-by: Jiri Bohac <jbohac@suse.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: David Miller <davem@davemloft.net>
Acked-by: Mel Gorman <mgorman@suse.de>
Cc: <stable@vger.kernel.org> [3.6+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
This patch moves the initialization of the size_index table slightly
earlier so that the first few kmem_cache_node's can be safely allocated
when KMALLOC_MIN_SIZE is large.
There are currently two ways to generate indices into kmalloc_caches (via
kmalloc_index() and via the size_index table in slab_common.c) and on some
arches (possibly only MIPS) they potentially disagree with each other
until create_kmalloc_caches() has been called. It seems that the
intention is that the size_index table is a fast equivalent to
kmalloc_index() and that create_kmalloc_caches() patches the table to
return the correct value for the cases where kmalloc_index()'s
if-statements apply.
The failing sequence was:
* kmalloc_caches contains NULL elements
* kmem_cache_init initialises the element that 'struct
kmem_cache_node' will be allocated to. For 32-bit Mips, this is a
56-byte struct and kmalloc_index returns KMALLOC_SHIFT_LOW (7).
* init_list is called which calls kmalloc_node to allocate a 'struct
kmem_cache_node'.
* kmalloc_slab selects the kmem_caches element using
size_index[size_index_elem(size)]. For MIPS, size is 56, and the
expression returns 6.
* This element of kmalloc_caches is NULL and allocation fails.
* If it had not already failed, it would have called
create_kmalloc_caches() at this point which would have changed
size_index[size_index_elem(size)] to 7.
I don't believe the bug to be LLVM specific but GCC doesn't normally
encounter the problem. I haven't been able to identify exactly what GCC
is doing better (probably inlining) but it seems that GCC is managing to
optimize to the point that it eliminates the problematic allocations.
This theory is supported by the fact that GCC can be made to fail in the
same way by changing inline, __inline, __inline__, and __always_inline in
include/linux/compiler-gcc.h such that they don't actually inline things.
Signed-off-by: Daniel Sanders <daniel.sanders@imgtec.com>
Acked-by: Pekka Enberg <penberg@kernel.org>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
We converted some of the usages of ACCESS_ONCE to READ_ONCE in the mm/
tree since it doesn't work reliably on non-scalar types.
This patch removes the rest of the usages of ACCESS_ONCE, and use the new
READ_ONCE API for the read accesses. This makes things cleaner, instead
of using separate/multiple sets of APIs.
Signed-off-by: Jason Low <jason.low2@hp.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Davidlohr Bueso <dave@stgolabs.net>
Acked-by: Rik van Riel <riel@redhat.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Use the normal return values for bool functions
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
By moving the O option detection into the switch statement, we allow this
parameter to be combined with other options correctly. Previously options
like slub_debug=OFZ would only detect the 'o' and use DEBUG_DEFAULT_FLAGS
to fill in the rest of the flags.
Signed-off-by: Chris J Arges <chris.j.arges@canonical.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Commit 9aabf810a67c ("mm/slub: optimize alloc/free fastpath by removing
preemption on/off") introduced an occasional hang for kernels built with
CONFIG_PREEMPT && !CONFIG_SMP.
The problem is the following loop the patch introduced to
slab_alloc_node and slab_free:
do {
tid = this_cpu_read(s->cpu_slab->tid);
c = raw_cpu_ptr(s->cpu_slab);
} while (IS_ENABLED(CONFIG_PREEMPT) && unlikely(tid != c->tid));
GCC 4.9 has been observed to hoist the load of c and c->tid above the
loop for !SMP kernels (as in this case raw_cpu_ptr(x) is compile-time
constant and does not force a reload). On arm64 the generated assembly
looks like:
ldr x4, [x0,#8]
loop:
ldr x1, [x0,#8]
cmp x1, x4
b.ne loop
If the thread is preempted between the load of c->tid (into x1) and tid
(into x4), and an allocation or free occurs in another thread (bumping
the cpu_slab's tid), the thread will be stuck in the loop until
s->cpu_slab->tid wraps, which may be forever in the absence of
allocations/frees on the same CPU.
This patch changes the loop condition to access c->tid with READ_ONCE.
This ensures that the value is reloaded even when the compiler would
otherwise assume it could cache the value, and also ensures that the
load will not be torn.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Steve Capper <steve.capper@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
With this patch kasan will be able to catch bugs in memory allocated by
slub. Initially all objects in newly allocated slab page, marked as
redzone. Later, when allocation of slub object happens, requested by
caller number of bytes marked as accessible, and the rest of the object
(including slub's metadata) marked as redzone (inaccessible).
We also mark object as accessible if ksize was called for this object.
There is some places in kernel where ksize function is called to inquire
size of really allocated area. Such callers could validly access whole
allocated memory, so it should be marked as accessible.
Code in slub.c and slab_common.c files could validly access to object's
metadata, so instrumentation for this files are disabled.
Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Signed-off-by: Dmitry Chernenkov <dmitryc@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Konstantin Serebryany <kcc@google.com>
Signed-off-by: Andrey Konovalov <adech.fo@gmail.com>
Cc: Yuri Gribov <tetra2005@gmail.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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It's ok for slub to access memory that marked by kasan as inaccessible
(object's metadata). Kasan shouldn't print report in that case because
these accesses are valid. Disabling instrumentation of slub.c code is not
enough to achieve this because slub passes pointer to object's metadata
into external functions like memchr_inv().
We don't want to disable instrumentation for memchr_inv() because this is
quite generic function, and we don't want to miss bugs.
metadata_access_enable/metadata_access_disable used to tell KASan where
accesses to metadata starts/end, so we could temporarily disable KASan
reports.
Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Konstantin Serebryany <kcc@google.com>
Cc: Dmitry Chernenkov <dmitryc@google.com>
Signed-off-by: Andrey Konovalov <adech.fo@gmail.com>
Cc: Yuri Gribov <tetra2005@gmail.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Remove static and add function declarations to linux/slub_def.h so it
could be used by kernel address sanitizer.
Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Konstantin Serebryany <kcc@google.com>
Cc: Dmitry Chernenkov <dmitryc@google.com>
Signed-off-by: Andrey Konovalov <adech.fo@gmail.com>
Cc: Yuri Gribov <tetra2005@gmail.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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printk and friends can now format bitmaps using '%*pb[l]'. cpumask
and nodemask also provide cpumask_pr_args() and nodemask_pr_args()
respectively which can be used to generate the two printf arguments
necessary to format the specified cpu/nodemask.
* This is an equivalent conversion but the whole function should be
converted to use scnprinf famiily of functions rather than
performing custom output length predictions in multiple places.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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To speed up further allocations SLUB may store empty slabs in per cpu/node
partial lists instead of freeing them immediately. This prevents per
memcg caches destruction, because kmem caches created for a memory cgroup
are only destroyed after the last page charged to the cgroup is freed.
To fix this issue, this patch resurrects approach first proposed in [1].
It forbids SLUB to cache empty slabs after the memory cgroup that the
cache belongs to was destroyed. It is achieved by setting kmem_cache's
cpu_partial and min_partial constants to 0 and tuning put_cpu_partial() so
that it would drop frozen empty slabs immediately if cpu_partial = 0.
The runtime overhead is minimal. From all the hot functions, we only
touch relatively cold put_cpu_partial(): we make it call
unfreeze_partials() after freezing a slab that belongs to an offline
memory cgroup. Since slab freezing exists to avoid moving slabs from/to a
partial list on free/alloc, and there can't be allocations from dead
caches, it shouldn't cause any overhead. We do have to disable preemption
for put_cpu_partial() to achieve that though.
The original patch was accepted well and even merged to the mm tree.
However, I decided to withdraw it due to changes happening to the memcg
core at that time. I had an idea of introducing per-memcg shrinkers for
kmem caches, but now, as memcg has finally settled down, I do not see it
as an option, because SLUB shrinker would be too costly to call since SLUB
does not keep free slabs on a separate list. Besides, we currently do not
even call per-memcg shrinkers for offline memcgs. Overall, it would
introduce much more complexity to both SLUB and memcg than this small
patch.
Regarding to SLAB, there's no problem with it, because it shrinks
per-cpu/node caches periodically. Thanks to list_lru reparenting, we no
longer keep entries for offline cgroups in per-memcg arrays (such as
memcg_cache_params->memcg_caches), so we do not have to bother if a
per-memcg cache will be shrunk a bit later than it could be.
[1] http://thread.gmane.org/gmane.linux.kernel.mm/118649/focus=118650
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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It is supposed to return 0 if the cache has no remaining objects and 1
otherwise, while currently it always returns 0. Fix it.
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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SLUB's version of __kmem_cache_shrink() not only removes empty slabs, but
also tries to rearrange the partial lists to place slabs filled up most to
the head to cope with fragmentation. To achieve that, it allocates a
temporary array of lists used to sort slabs by the number of objects in
use. If the allocation fails, the whole procedure is aborted.
This is unacceptable for the kernel memory accounting extension of the
memory cgroup, where we want to make sure that kmem_cache_shrink()
successfully discarded empty slabs. Although the allocation failure is
utterly unlikely with the current page allocator implementation, which
retries GFP_KERNEL allocations of order <= 2 infinitely, it is better not
to rely on that.
This patch therefore makes __kmem_cache_shrink() allocate the array on
stack instead of calling kmalloc, which may fail. The array size is
chosen to be equal to 32, because most SLUB caches store not more than 32
objects per slab page. Slab pages with <= 32 free objects are sorted
using the array by the number of objects in use and promoted to the head
of the partial list, while slab pages with > 32 free objects are left in
the end of the list without any ordering imposed on them.
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Acked-by: Christoph Lameter <cl@linux.com>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Huang Ying <ying.huang@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Sometimes, we need to iterate over all memcg copies of a particular root
kmem cache. Currently, we use memcg_cache_params->memcg_caches array for
that, because it contains all existing memcg caches.
However, it's a bad practice to keep all caches, including those that
belong to offline cgroups, in this array, because it will be growing
beyond any bounds then. I'm going to wipe away dead caches from it to
save space. To still be able to perform iterations over all memcg caches
of the same kind, let us link them into a list.
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Tejun Heo <tj@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Currently, kmem_cache stores a pointer to struct memcg_cache_params
instead of embedding it. The rationale is to save memory when kmem
accounting is disabled. However, the memcg_cache_params has shrivelled
drastically since it was first introduced:
* Initially:
struct memcg_cache_params {
bool is_root_cache;
union {
struct kmem_cache *memcg_caches[0];
struct {
struct mem_cgroup *memcg;
struct list_head list;
struct kmem_cache *root_cache;
bool dead;
atomic_t nr_pages;
struct work_struct destroy;
};
};
};
* Now:
struct memcg_cache_params {
bool is_root_cache;
union {
struct {
struct rcu_head rcu_head;
struct kmem_cache *memcg_caches[0];
};
struct {
struct mem_cgroup *memcg;
struct kmem_cache *root_cache;
};
};
};
So the memory saving does not seem to be a clear win anymore.
OTOH, keeping a pointer to memcg_cache_params struct instead of embedding
it results in touching one more cache line on kmem alloc/free hot paths.
Besides, it makes linking kmem caches in a list chained by a field of
struct memcg_cache_params really painful due to a level of indirection,
while I want to make them linked in the following patch. That said, let
us embed it.
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Tejun Heo <tj@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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