From: Sami Tolvanen Date: Fri, 11 Jan 2019 00:07:19 +0000 (-0800) Subject: Revert "ANDROID: dm verity: add minimum prefetch size" X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0df6179ff59959f47eb066e52d4fa3560e1000d4;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git Revert "ANDROID: dm verity: add minimum prefetch size" This reverts commit ace74ccf82cfb2b73ce1df2e698d20c2fbc559dd. Bug: 71728490 Change-Id: Iebcb0cd9982f36c4bd2552811f9147325a291db0 Signed-off-by: Sami Tolvanen --- diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig index 5649d1ab0083..cef37a190c2c 100644 --- a/drivers/md/Kconfig +++ b/drivers/md/Kconfig @@ -459,21 +459,6 @@ 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 @@ -537,7 +522,6 @@ config DM_ANDROID_VERITY depends on ASYMMETRIC_KEY_TYPE depends on ASYMMETRIC_PUBLIC_KEY_SUBTYPE depends on MD_LINEAR=y - 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 diff --git a/drivers/md/dm-verity-target.c b/drivers/md/dm-verity-target.c index 3294b8a87887..ff24ed6bc3cc 100644 --- a/drivers/md/dm-verity-target.c +++ b/drivers/md/dm-verity-target.c @@ -702,7 +702,6 @@ static void verity_prefetch_io(struct work_struct *work) container_of(work, struct dm_verity_prefetch_work, work); struct dm_verity *v = pw->v; int i; - sector_t prefetch_size; for (i = v->levels - 2; i >= 0; i--) { sector_t hash_block_start; @@ -725,14 +724,8 @@ static void verity_prefetch_io(struct work_struct *work) hash_block_end = v->hash_blocks - 1; } no_prefetch_cluster: - // for emmc, it is more efficient to send bigger read - prefetch_size = max((sector_t)CONFIG_DM_VERITY_HASH_PREFETCH_MIN_SIZE, - hash_block_end - hash_block_start + 1); - if ((hash_block_start + prefetch_size) >= (v->hash_start + v->hash_blocks)) { - prefetch_size = hash_block_end - hash_block_start + 1; - } dm_bufio_prefetch(v->bufio, hash_block_start, - prefetch_size); + hash_block_end - hash_block_start + 1); } kfree(pw);