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| author | Sheng Yong <shengyong1@huawei.com> | 2017-11-22 11:23:38 +0100 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-01-03 04:27:27 +0100 |
| commit | f6df8f234e2502b7d8c6de42e066e01f908318cc (patch) | |
| tree | a170ca3b3040ea216a21580ffff774dafb32b672 /fs/f2fs/f2fs.h | |
| parent | f2fs: fix concurrent problem for updating free bitmap (diff) | |
| download | linux-f6df8f234e2502b7d8c6de42e066e01f908318cc.tar.xz linux-f6df8f234e2502b7d8c6de42e066e01f908318cc.zip | |
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 'fs/f2fs/f2fs.h')
| -rw-r--r-- | fs/f2fs/f2fs.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index ef68433a2363..7cb79fbebb63 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -1093,6 +1093,7 @@ struct f2fs_sb_info { int dir_level; /* directory level */ int inline_xattr_size; /* inline xattr size */ unsigned int trigger_ssr_threshold; /* threshold to trigger ssr */ + int readdir_ra; /* readahead inode in readdir */ block_t user_block_count; /* # of user blocks */ block_t total_valid_block_count; /* # of valid blocks */ |