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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 /Documentation/filesystems/f2fs.txt | |
| 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>
Diffstat (limited to 'Documentation/filesystems/f2fs.txt')
| -rw-r--r-- | Documentation/filesystems/f2fs.txt | 5 |
1 files changed, 3 insertions, 2 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 |