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authorJaegeuk Kim <jaegeuk.kim@samsung.com>2014-02-27 20:09:05 +0900
committerJaegeuk Kim <jaegeuk.kim@samsung.com>2014-02-27 20:31:15 +0900
commitab9fa662e4867455f44f4de96d29a7f09cf292c6 (patch)
treeefa4cc308d41d83c0bd527df11bda8ca48e5eca8 /Documentation/filesystems
parent3843154598a00408f4214a68bd536fdf27b1df10 (diff)
downloadlinux-ab9fa662e4867455f44f4de96d29a7f09cf292c6.tar.bz2
f2fs: add an sysfs entry to control the directory level
This patch adds an sysfs entry to control dir_level used by the large directory. The description of this entry is: dir_level This parameter controls the directory level to support large directory. If a directory has a number of files, it can reduce the file lookup latency by increasing this dir_level value. Otherwise, it needs to decrease this value to reduce the space overhead. The default value is 0. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'Documentation/filesystems')
-rw-r--r--Documentation/filesystems/f2fs.txt7
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/filesystems/f2fs.txt b/Documentation/filesystems/f2fs.txt
index 8eb06b0a7d2b..803784e1e8ef 100644
--- a/Documentation/filesystems/f2fs.txt
+++ b/Documentation/filesystems/f2fs.txt
@@ -195,6 +195,13 @@ Files in /sys/fs/f2fs/<devname>
cleaning operations. The default value is 4096
which covers 8GB block address range.
+ dir_level This parameter controls the directory level to
+ support large directory. If a directory has a
+ number of files, it can reduce the file lookup
+ latency by increasing this dir_level value.
+ Otherwise, it needs to decrease this value to
+ reduce the space overhead. The default value is 0.
+
================================================================================
USAGE
================================================================================