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| author |   Jaegeuk Kim <jaegeuk@kernel.org> | 2020-01-06 16:43:09 -0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2020-01-17 16:48:43 -0800 |
| commit | 0e7f41974e9c6ceac3ac9b5d0377c5f74b1bc4fc (patch) | |
| tree | f0ac5c4242560a103d231f744a458355bc5d219d | |
| parent | f2fs: code cleanup for f2fs_statfs_project() (diff) | |
| download | linux-dev-0e7f41974e9c6ceac3ac9b5d0377c5f74b1bc4fc.tar.xz linux-dev-0e7f41974e9c6ceac3ac9b5d0377c5f74b1bc4fc.zip | |
f2fs: add a way to turn off ipu bio cache
Setting 0x40 in /sys/fs/f2fs/dev/ipu_policy gives a way to turn off
bio cache, which is useufl to check whether block layer using hardware
encryption engine merges IOs correctly.
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
| -rw-r--r-- | Documentation/filesystems/f2fs.txt | 5 | ||||
| -rw-r--r-- | fs/f2fs/segment.c | 2 | ||||
| -rw-r--r-- | fs/f2fs/segment.h | 2 |
3 files changed, 6 insertions, 3 deletions
diff --git a/Documentation/filesystems/f2fs.txt b/Documentation/filesystems/f2fs.txt index 41b5aa94b30f..b80a7b69f210 100644 --- a/Documentation/filesystems/f2fs.txt +++ b/Documentation/filesystems/f2fs.txt @@ -331,10 +331,11 @@ Files in /sys/fs/f2fs/<devname> conducts. 32 sections is set by default. ipu_policy This parameter controls the policy of in-place - updates in f2fs. There are five policies: + updates in f2fs. User can set: 0x01: F2FS_IPU_FORCE, 0x02: F2FS_IPU_SSR, 0x04: F2FS_IPU_UTIL, 0x08: F2FS_IPU_SSR_UTIL, - 0x10: F2FS_IPU_FSYNC. + 0x10: F2FS_IPU_FSYNC, 0x40: F2FS_IPU_NOCACHE. + Refer segment.h for details. min_ipu_util This parameter controls the threshold to trigger in-place-updates. The number indicates percentage diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 72cf2574a00d..1d3bb2605b03 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -3289,7 +3289,7 @@ int f2fs_inplace_write_data(struct f2fs_io_info *fio) stat_inc_inplace_blocks(fio->sbi); - if (fio->bio) + if (fio->bio && !(SM_I(sbi)->ipu_policy & (1 << F2FS_IPU_NOCACHE))) err = f2fs_merge_page_bio(fio); else err = f2fs_submit_page_bio(fio); diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h index a1b3951367cd..5e6cd8d8411d 100644 --- a/fs/f2fs/segment.h +++ b/fs/f2fs/segment.h @@ -608,6 +608,7 @@ static inline int utilization(struct f2fs_sb_info *sbi) * F2FS_IPU_FSYNC - activated in fsync path only for high performance flash * storages. IPU will be triggered only if the # of dirty * pages over min_fsync_blocks. + * F2FS_IPU_NOCACHE - disable IPU bio cache. * F2FS_IPUT_DISABLE - disable IPU. (=default option) */ #define DEF_MIN_IPU_UTIL 70 @@ -623,6 +624,7 @@ enum { F2FS_IPU_SSR_UTIL, F2FS_IPU_FSYNC, F2FS_IPU_ASYNC, + F2FS_IPU_NOCACHE, }; static inline unsigned int curseg_segno(struct f2fs_sb_info *sbi, |