diff options
| author | Sheng Yong <shengyong1@huawei.com> | 2017-11-22 18:23:38 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-02-07 17:53:28 -0800 |
| commit | 47ee9b259811529a4653910f39648dbecd6bf89c (patch) | |
| tree | 40ce1f31c3fe751f0e3af927992c158f3eb7b18b /Documentation/ABI/testing | |
| parent | 55e2f89181ceff5dcebd87c0138d64dba8c3644d (diff) | |
f2fs: introduce sysfs readdir_ra to readahead inode block in readdir
This patch introduces a sysfs interface readdir_ra to enable/disable
readaheading inode block in f2fs_readdir. When readdir_ra is enabled,
it improves the performance of "readdir + stat".
For 300,000 files:
time find /data/test > /dev/null
disable readdir_ra: 1m25.69s real 0m01.94s user 0m50.80s system
enable readdir_ra: 0m18.55s real 0m00.44s user 0m15.39s system
Signed-off-by: Sheng Yong <shengyong1@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'Documentation/ABI/testing')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-fs-f2fs | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index 2baed1151eac..db7aab1516de 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -186,3 +186,9 @@ Date: August 2017 Contact: "Jaegeuk Kim" <jaegeuk@kernel.org> Description: Controls sleep time of GC urgent mode + +What: /sys/fs/f2fs/<disk>/readdir_ra +Date: November 2017 +Contact: "Sheng Yong" <shengyong1@huawei.com> +Description: + Controls readahead inode block in readdir. |