[PATCH] f2fs: update f2fs document regarding to fsync_mode
From: Jaegeuk Kim
Date: Wed Jan 08 2020 - 18:10:02 EST
This patch adds missing fsync_mode entry in f2fs document.
Fixes: 04485987f053 ("f2fs: introduce async IPU policy")
Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
---
Documentation/filesystems/f2fs.txt | 3 ++-
fs/f2fs/segment.h | 5 +++--
2 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/Documentation/filesystems/f2fs.txt b/Documentation/filesystems/f2fs.txt
index b80a7b69f210..ee61ace30276 100644
--- a/Documentation/filesystems/f2fs.txt
+++ b/Documentation/filesystems/f2fs.txt
@@ -334,7 +334,8 @@ Files in /sys/fs/f2fs/<devname>
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, 0x40: F2FS_IPU_NOCACHE.
+ 0x10: F2FS_IPU_FSYNC, 0x20: F2FS_IPU_ASYNC,
+ 0x40: F2FS_IPU_NOCACHE.
Refer segment.h for details.
min_ipu_util This parameter controls the threshold to trigger
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index 5e6cd8d8411d..459dc3901a57 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -607,9 +607,10 @@ static inline int utilization(struct f2fs_sb_info *sbi)
* threashold,
* 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.
+ * pages over min_fsync_blocks. (=default option)
+ * F2FS_IPU_ASYNC - do IPU given by asynchronous write requests.
* F2FS_IPU_NOCACHE - disable IPU bio cache.
- * F2FS_IPUT_DISABLE - disable IPU. (=default option)
+ * F2FS_IPUT_DISABLE - disable IPU. (=default option in LFS mode)
*/
#define DEF_MIN_IPU_UTIL 70
#define DEF_MIN_FSYNC_BLOCKS 8
--
2.24.0.525.g8f36a354ae-goog