From f6df8f234e2502b7d8c6de42e066e01f908318cc Mon Sep 17 00:00:00 2001 From: Sheng Yong Date: Wed, 22 Nov 2017 18:23:38 +0800 Subject: 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 Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim --- Documentation/ABI/testing/sysfs-fs-f2fs | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'Documentation/ABI') diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index a7799c2fca28..d870b5514d15 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" Description: Controls sleep time of GC urgent mode + +What: /sys/fs/f2fs//readdir_ra +Date: November 2017 +Contact: "Sheng Yong" +Description: + Controls readahead inode block in readdir. -- cgit v1.2.3-55-g7522