diff options
| author | Yangtao Li <frank.li@vivo.com> | 2023-02-06 22:43:09 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2023-02-07 10:46:47 -0800 |
| commit | 9e615dbba41e2a56bb4ae50c56f4c10294fa16b8 (patch) | |
| tree | 0642ca01498c49b2d4c6c694485d07eac2a7b6da | |
| parent | c5bf83483382600988d7db5ffe9fcd1936b491fd (diff) | |
f2fs: add missing description for ipu_policy node
IPU policy can be disabled, let's add description for it and other policy.
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
| -rw-r--r-- | Documentation/ABI/testing/sysfs-fs-f2fs | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index 0f17adc80488..94132745ecbe 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -49,16 +49,23 @@ Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com> Description: Controls the in-place-update policy. 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 - 0x20 F2FS_IPU_ASYNC - 0x40 F2FS_IPU_NOCACHE - 0x80 F2FS_IPU_HONOR_OPU_WRITE - ==== ================= + ===== =============== =================================================== + value policy description + 0x00 DISABLE disable IPU(=default option in LFS mode) + 0x01 FORCE all the time + 0x02 SSR if SSR mode is activated + 0x04 UTIL if FS utilization is over threashold + 0x08 SSR_UTIL if SSR mode is activated and FS utilization is over + threashold + 0x10 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. + (=default option) + 0x20 ASYNC do IPU given by asynchronous write requests + 0x40 NOCACHE disable IPU bio cache + 0x80 HONOR_OPU_WRITE use OPU write prior to IPU write if inode has + FI_OPU_WRITE flag + ===== =============== =================================================== Refer segment.h for details. |