| Age | Commit message (Collapse) | Author |
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'x86/build', 'x86/cleanups', 'x86/cpa', 'x86/cpu', 'x86/defconfig', 'x86/gart', 'x86/i8259', 'x86/intel', 'x86/irqstats', 'x86/kconfig', 'x86/ldt', 'x86/mce', 'x86/memtest', 'x86/pat', 'x86/ptemask', 'x86/resumetrace', 'x86/threadinfo', 'x86/timers', 'x86/vdso' and 'x86/xen' into x86/devel
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1) replace kmalloc/memset with equivalent kzalloc.
Signed-off-by: Christophe Jaillet <jaillet.christophe@wanadoo.fr>
Cc: cj <jaillet.christophe@wanadoo.fr>
Cc: petero2@telia.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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> That helped a lot, the system seems to work normally now.
>
> Here's the relevant snippet from dmesg:
>
> [ 0.108006] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
> [ 0.108006] ..MP-BIOS bug: 8254 timer not connected to IO-APIC
> [ 0.108006] ...trying to set up timer (IRQ0) through the 8259A ... <3>
> [ 0.108006] ..... (found apic 0 pin 2) ...<3> failed.
> [ 0.108006] ...trying to set up timer as Virtual Wire IRQ...<3> works.
>
> and the whole thing is at: http://www.sisk.pl/kernel/debug/20080618/dmesg-2.log
Hmm, that only proved the 8259A is indeed wired to the pin #2 of the I/O
APIC.
> I, personally, don't have any and AMD only has SB600 documentation on its
> web page (it's still marked as "AMD confidential" ;-)).
Well, the IC block is most likely the same as that's not rocket science
and once done there is no need to fiddle with that. That written, I am
afraid there is nothing useful about the IC in the document, except that
it's there and consists of an I/O APIC providing 24 inputs and the usual
pair of 8259A cores. Thanks for the reference anyway.
> There is an interrupt controller in there, but I'm not sure if there's any
> 8259A. The northbridge is on the CPU, actually.
I will praise the day someone ships an x86 machine without an 8259A core!
As expressed in another mail I suspect there may actually be a direct
route from the 8254 to INTIN0 in the southbridge -- this is what other
bootstrap logs seen in the Internet suggest. This would mean this
particular BIOS is buggy (is it the latest version?) and provides an
incorrect IRQ override in its ACPI tables, for example because the
responsible block has been blindly copied from a machine using a commoner
wiring. This could be moderately easily fixed up with a quirk based on
the PCI ID (after checking it again, we actually used to have a quirk for
ATI in this area, but the way it was done suggests the issue was not
understood well enough).
Could you please remove the hack sent yesterday and test the patch
provided below? I do hope it builds, but I have no immediate means to
check it. Please report the output. The intent is to test INTIN0
directly before testing INTIN2 through the 8259A. Thanks.
Aside of that, what I have gathered from your reports (please correct me
if I have got it wrong) is that when the through-8259A mode is used, then
after a while 8254 timer interrupts stop arriving. What's interesting,
the "Virtual Wire IRQ" seems to work for you correctly (that's quite an
odd setup where a local APIC input is used in the native mode -- please
post /proc/interrupts for confirmation), which in turn implies the master
8259A drives its INT output as we expect. Why would the I/O APIC input
have problems then? Hmm...
[ mingo@elte.hu: revert the "x86: fix IO APIC breakage on HP nx6325"
version. ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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On Thu, 19 Jun 2008, Rafael J. Wysocki wrote:
> > With such a configuration the "x86: I/O APIC: timer through 8259A
> > second-chance" patch should not matter, because the only change it
> > introduces is an attempt to try the same I/O APIC pin again, but with the
> > IRQ0 line of the master 8259A enabled. That's not a terribly unusual
> > configuration and nothing should get confused in the system.
>
> But it _does_ get confused, really.
Something certainly gets confused, but so far I am not sure which bit
exactly it is, are you?
> > Barring the unlikely possibility of the 8259A actually being wired to
> > INTIN2 of the I/O APIC I can see two possible explanations:
> >
> > 1. The 8259A interrupt actually escapes to the CPU somehow and is handled
> > as an ExtINTA interrupt. This would make the code in check_timer()
> > decide it has found a working configuration, while actually it has been
> > fooled.
[...]
> Here you go:
>
> [ 0.108006] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
> [ 0.108006] ..MP-BIOS bug: 8254 timer not connected to IO-APIC
> [ 0.108006] ...trying to set up timer (IRQ0) through the 8259A ... <3>
> [ 0.108006] ..... (found apic 0 pin 2) ...<3> works.
>
> The full dmesg is at: http://www.sisk.pl/kernel/debug/20080618/dmesg-1.log
Thanks. In this case I suspect the case #1 quoted above happens, that is
the 8259A manages to deliver its interrupt somehow. Note at this stage it
is meant to be in the AEOI mode, so it can happily resubmit the interrupt
indefinitely with no additional handling as long as it receives INTA
cycles.
Can you please try the patch below on top of "x86: I/O APIC: timer
through 8259A second-chance" to see whether my hypothesis is true? It
modifies the through-8259A setup path so that the APIC input gets masked,
but the 8259A has the timer interrupt still enabled. Let me know how the
timer interrupt is routed in this case.
Bisected-by: "Rafael J. Wysocki" <rjw@sisk.pl>
Tested-by: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Before:
total: 91 errors, 73 warnings, 2850 lines checked
After:
total: 1 errors, 47 warnings, 2848 lines checked
Compile tested:
paolo@paolo-desktop:/tmp$ size io*
text data bss dec hex filename
13836 1756 11104 26696 6848 io_apic_32.o.after
13836 1756 11104 26696 6848 io_apic_32.o.before
Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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This patch replaces some hard-coded numbers with predefined names.
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Each I/O APIC redirection table entry has a number of fields.
Define names for them to eliminate reference by hard coded
numbers.
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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If configured to use the I/O APIC, the NMI watchdog is deemed to fail if
the chip has been deactivated as a result of "noapic". Downgrade to the
local APIC watchdog similarly to what is done for the UP case.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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If configured to use the I/O APIC, the NMI watchdog is deemed to fail if
the chip has been deactivated as a result of "nosmp". Downgrade to the
local APIC watchdog similarly to what is done for the UP case.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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For the UP case the NMI watchdog downgrade is done consistently in
APIC_init_uniprocessor() now. Remove redundant code used only when
BIOS-disabled local APIC is activated.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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If configured to use the I/O APIC, the NMI watchdog is deemed to fail if
the chip will not be used in the UP configuration, because "noapic" has
been specified or the chip is simply not there. Downgrade to the local
APIC watchdog to rectify.
The new #ifdef is ugly, I know. A proper solution is to provide suitable
definitions of smp_found_config, etc. for !CONFIG_X86_IO_APIC in a header.
Likewise the whole if () condition should be moved to a static inline
function. Such clean-ups are beyond the scope of this change and can be
done once the whole issue of the timer has been sorted out.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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A downgrade helper for the NMI watchdog to be used in all places where
the I/O APIC watchdog may have been requested, but the I/O APIC is found
not to be there or meant to be left disabled. This is so that the
reconfiguration is cosistent and defined in a single place only.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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This reverts commit 791b93d3dfaf16c23e978bec0cc0a3dd9d855d63.
A better fix from Maciej will be merged.
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This reverts commit 2229ff84f01746d02fb6b79e156fb5cce48c908f.
A better fix from Maciej will be merged.
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nmi_watchdog=1 hangs on 64-bit:
[ 0.250000] Detected 12.564 MHz APIC timer.
[ 0.254178] APIC timer registered as dummy, due to nmi_watchdog=1!
[ 0.260366] Testing NMI watchdog ... <4>WARNING: CPU#0: NMI appears to be stuck (0->0)!
[ ... ]
[ 0.470003] calling genl_init+0x0/0xd0
[ hard hang ]
bisected it down to:
git-bisect start
git-bisect good 1beee8dc8cf58e3f605bd7b34d7a39939be7d8d2
git-bisect bad 11582ece0aaa2d0f94f345c08a4ab9997078a083
git-bisect bad 5479c623bb44089844022c03d4c0eb16d5b7a15f
git-bisect bad cfb4c7fabeb499e1c29f9d1878968e37a938e28a
git-bisect good 246dd412d31e4f5de1d43aa6422a325b785f36e4
git-bisect bad 3f8237eaff7dc1e35fa791dae095574fd974e671
git-bisect good 90e23b13ab849e2a11f00c655eb3a2011b4623be
git-bisect bad 833526a34eeefc117df3191a594c3c3a4f15a9ac
git-bisect good 791b93d3dfaf16c23e978bec0cc0a3dd9d855d63
git-bisect bad 65767c64068f2c93e56a1accfed5c78230ac12d7
git-bisect bad 2abc5c05dd82c188e3bdf6641a274f013348d14b
git-bisect bad 317e1f2597ffb4d4db940577bbe56dc6e881ef07
| 317e1f2597ffb4d4db940577bbe56dc6e881ef07 is first bad commit
| commit 317e1f2597ffb4d4db940577bbe56dc6e881ef07
| Author: Maciej W. Rozycki <macro@linux-mips.org>
| Date: Wed May 21 22:10:22 2008 +0100
| x86: I/O APIC: clean up the 8259A on a NMI watchdog failure
the problem is that in the dummy-lapic branch we rely on the i8259A
but if the NMI watchdog fails we turn off IRQ 0 - which doesnt work
too well ;-)
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Not sure but maybe it is better to use NMI_DISABLED,
will take a look. But for now this patch is not change
anything in logic so it will not hurt/broke the kernel.
For most cases nmi_watchdog assignment is by one of NMI_*
macro so I think there it make sense too.
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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arch/x86/kernel/io_apic_64.c: In function 'check_timer':
arch/x86/kernel/io_apic_64.c:1688: error: 'vector' undeclared (first use in this function)
arch/x86/kernel/io_apic_64.c:1688: error: (Each undeclared identifier is reported only once
arch/x86/kernel/io_apic_64.c:1688: error: for each function it appears in.)
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Some systems incorrectly report the ExtINTA pin of the I/O APIC as the
genuine target of the timer interrupt. Here is a change that copies timer
pin information found to the other pin if one has been found only. This
way both a direct and a through-8259A route is tested with the pin letting
these problematic systems work well enough. If no timer pin information
has been found for the I/O APIC, then local APIC variations are tried
only, similarly to what is done without the change (except without the
misleading messages).
Obviously if we try the first-chance path without being told by the BIOS
to do so, we should not complain either, so do not print the message in
this case.
The 64-bit variation should be updated with a call to
replace_pin_at_irq() which can be done with the upcoming merge. Since
add_pin_to_irq() is now always called in the first-chance path, the
condition to require it in the second-chance path no longer happens.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Keep the timer interrupt line masked when reconfiguring its interrupt
redirection entry in the I/O APIC.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Unmask the timer interrupt line set up in the through-8259A mode
explicitly after setup_timer_IRQ0_pin() has set up the I/O APIC interrupt
redirection entry to let the two operations be unbound from each other.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Rename setup_ExtINT_IRQ0_pin() to setup_timer_IRQ0_pin() to better
reflect the upcoming role of a function setting up a (semi-)arbitrary I/O
APIC pin appropriately for the 8254 timer. By "appropriate" the following
settings are meant: edge-triggered, active-high, all the other settings
per-architecture. Adjust comments to reflect code appropriately. No
functional changes.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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The LINT0 line of the local APIC is masked in the LVT0 entry in
check_timer() before this function is ever called. Removed the
redundant unmasking for better control.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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For a better control the masking and unmasking of the timer interrupt
line in the 8259A operating in the 'Virtual Wire' mode has been moved out
of setup_ExtINT_IRQ0_pin() now, so remove the redundant calls from the
function.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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When the through-8259A mode is used for the timer, the call to
set_irq_handler() will register a NULL handler name, resulting in
"IO-APIC-<NULL>" reported. Fix by calling ioapic_register_intr() as done
for all the other I/O APIC interrupts.
The 64-bit variation calls set_irq_chip_and_handler_name() here
needlessly and should get fixed with the upcoming merge.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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The local APIC interrupt handler gets registered with
set_irq_chip_and_handler_name(), which results in
"local-APIC-edge-fasteoi" reported as the name of the handler. Fix by
removing the type of the handler left over from before the generic
handlers were introduced.
The 64-bit variation should get fixed with the upcoming merge.
NB It should really use the "edge" handler and not the "fasteoi" one,
but that's a separate issue.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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There is no point in keeping the 8259A enabled if the I/O APIC NMI
watchdog has failed and the 8259A is not used to pass through regular
timer interrupts. This fixes problems with some systems where some logic
gets confused.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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If configured to use the I/O APIC, the NMI watchdog is deemed to fail if
the chip has been deactivated as a result of "nosmp". Downgrade to the
local APIC watchdog similarly to what is done for the UP case.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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The local APIC is no longer forced off when "nosmp" has been specified.
Correct the message printed.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Disable the 8259A acting in the "virtual wire" mode to keep the interrupt
line inactive while fiddling with local APIC interrupt vector registers
associated with its destination inputs. To be on the safe side,
especially concerning flipping the trigger mode.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Disable the 8259A when routing of the timer interrupt through the chip to
the local APIC of the primary processor has failed.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Remove the "disable_8254_timer" and "enable_8254_timer" kernel
parameters. Now that AEOI acknowledgements are no longer needed for
correct timer operation, the 8259A can be kept disabled unconditionally
unless interrupts, either timer or watchdog ones, are actually passed
through it.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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The code that used to be in do_slow_gettimeoffset() that relied on the
IRR bit of the master 8259A PIC for IRQ0 to check the state of the output
timer 0 of the PIT is no longer there. As a result, there is no need to
use the POLL command to acknowledge the timer interrupt in the "8259A
Virtual Wire", except for the NMI watchdog when the i82489DX APIC is used
(this is because this particular APIC treats NMIs as level-triggered and
keeping the input asserted would keep motherboard NMI sources held off for
too long). Remove the unneeded bits and adjust comments accordingly.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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This reverts commit 0b6a39f7ebcb1c82587ce35b401c513eed41ac5c.
The changes in tip/x86/apic solve this better.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Use PAGE_OFFSET macro instead of using 0xffff810000000000UL directly.
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: hpa@zytor.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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arch/x86/mm/ioremap.c:308:11: error: incompatible types in comparison expression (different address spaces)
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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1) Remove __meminit from update_pages_count. It is used inside
split_pages()
2) Make the code depend on PROC_FS. Doing statistics for nothing is
useless and not adding useless code is nice to the Linux tiny folks.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Add information about the mapping state of the direct mapping to
/proc/meminfo. I chose /proc/meminfo because that is where all the other
memory statistics are too and it is a generally useful metric even
outside debugging situations. A lot of split kernel pages means the
kernel will run slower.
This way we can see how many large pages are really used for it and how
many are split.
Useful for general insight into the kernel.
v2: Add hotplug locking to 64bit to plug a very obscure theoretical race.
32bit doesn't need it because it doesn't support hotadd for lowmem.
Fix some typos
v3: Rename dpages_cnt
Add CONFIG ifdef for count update as requested by tglx
Expand description
v4: Fix stupid bugs added in v3
Move update_page_count to pageattr.c
Signed-off-by: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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v2: fix early_panic on this config:
http://redhat.com/~mingo/misc/config-Thu_Jun_19_14_22_37_CEST_2008.bad
reason : struct cpu_vendor_dev size is 16, need to make table to be 16
byte alignment
also print out the cpu supported...
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Dave Jones <davej@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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we may need to move some functions to common.c later
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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"Form follows function". Code is now where it belongs to.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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The name fits better since this is code not only for K8.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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On Tue, 17 Jun 2008, Rafael J. Wysocki wrote:
>
> BTW, with the C1E patches reverted I don't get the
> WARNING: at /home/rafael/src/linux-next/kernel/smp.c:215 smp_call_function_single+0x3d/0xa2
> in the log. Thomas?
The BROADCAST_FORCE notification uses smp_function_call and therefor
must be run with interrupts enabled.
While at it, add a comment for the BROADCAST_EXIT notifier as well.
Reported-and-bisected-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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C1E on AMD machines is like C3 but without control from the OS. Up to
now we disabled the local apic timer for those machines as it stops
when the CPU goes into C1E. This excludes those machines from high
resolution timers / dynamic ticks, which hurts especially X2 based
laptops.
The current boot time C1E detection has another, more serious flaw
as well: some BIOSes do not enable C1E until the ACPI processor module
is loaded. This causes systems to stop working after that point.
To work nicely with C1E enabled machines we use a separate idle
function, which checks on idle entry whether C1E was enabled in the
Interrupt Pending Message MSR. This allows us to do timer broadcasting
for C1E and covers the late enablement of C1E as well.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm
* 'kvm-updates-2.6.26' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm:
KVM: IOAPIC: Fix level-triggered irq injection hang
x86: KVM guest: Add memory clobber to hypercalls
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The pxa27x DMA controller defaults to 64-bit alignment. This caused
the SCR reads to fail (and, depending on card type, error out) when
card->raw_scr was not aligned on a 8-byte boundary.
For performance reasons all scatter-gather addresses passed to
pxamci_request should be aligned on 8-byte boundaries, but if
this can't be guaranteed, byte aligned DMA transfers in the
have to be enabled in the controller to get correct behaviour.
Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This reverts commit e872154921a6b5256a3c412dd69158ac0b135176.
Andrey Borzenkov reports that it resulted in a totally hung machine for
him when loading the OHCI driver. Extensive netconsole capture with
SysRq output shows that modprobe gets stuck in ohci_hub_status_data()
when probing and enabling the OHCI controller, see for example
http://lkml.org/lkml/2008/7/5/236
for an analysis.
The problem appears to be an interrupt flood triggered by the commit
that gets reverted, and Andrey confirmed that the revert makes things
work for him again.
Reported-and-tested-by: Andrey Borzenkov <arvidjaar@mail.ru>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: David Brownell <david-b@pacbell.net>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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