diff options
| author | Keun-young Park <keunyoung@google.com> | 2016-11-14 18:25:15 -0800 |
|---|---|---|
| committer | Amit Pundir <amit.pundir@linaro.org> | 2017-01-02 13:54:08 +0530 |
| commit | 26a380b3ce97e6c3919f7ea576b91b23f7e9728c (patch) | |
| tree | 3b68564656d83f9f96512412b4a4f408d52fa1b1 /drivers/md/Kconfig | |
| parent | 35194db1b78973c1b3251f5c7bea2c1bafec6a08 (diff) | |
ANDROID: dm verity: add minimum prefetch size
- For device like eMMC, it gives better performance to read more hash
blocks at a time.
- For android, set it to default 128.
For other devices, set it to 1 which is the same as now.
- saved boot-up time by 300ms in tested device
bug: 32246564
Cc: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Keun-young Park <keunyoung@google.com>
Diffstat (limited to 'drivers/md/Kconfig')
| -rw-r--r-- | drivers/md/Kconfig | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig index 6035794bc1f2..3d237a03dab3 100644 --- a/drivers/md/Kconfig +++ b/drivers/md/Kconfig @@ -458,6 +458,21 @@ config DM_VERITY If unsure, say N. +config DM_VERITY_HASH_PREFETCH_MIN_SIZE_128 + bool "Prefetch size 128" + +config DM_VERITY_HASH_PREFETCH_MIN_SIZE + int "Verity hash prefetch minimum size" + depends on DM_VERITY + range 1 4096 + default 128 if DM_VERITY_HASH_PREFETCH_MIN_SIZE_128 + default 1 + ---help--- + This sets minimum number of hash blocks to prefetch for dm-verity. + For devices like eMMC, having larger prefetch size like 128 can improve + performance with increased memory consumption for keeping more hashes + in RAM. + config DM_VERITY_FEC bool "Verity forward error correction support" depends on DM_VERITY @@ -510,6 +525,7 @@ config DM_ANDROID_VERITY depends on ASYMMETRIC_KEY_TYPE depends on ASYMMETRIC_PUBLIC_KEY_SUBTYPE depends on MD_LINEAR + select DM_VERITY_HASH_PREFETCH_MIN_SIZE_128 ---help--- This device-mapper target is virtually a VERITY target. This target is setup by reading the metadata contents piggybacked |