IPU policy can be disabled, let's add description for it and other policy.
Signed-off-by: Yangtao Li <frank...@vivo.com>
Reviewed-by: Chao Yu <c...@kernel.org>
---
v4:
-add Reviewed-by tag
Documentation/ABI/testing/sysfs-fs-f2fs | 27 ++++++++++++++++---------
1 file 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....@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.
--
2.25.1
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