diff options
| author | Jaegeuk Kim | 2014-02-27 20:09:05 +0900 |
|---|---|---|
| committer | Jaegeuk Kim | 2014-02-27 20:31:15 +0900 |
| commit | ab9fa662e4867455f44f4de96d29a7f09cf292c6 (patch) | |
| tree | efa4cc308d41d83c0bd527df11bda8ca48e5eca8 /fs/f2fs/super.c | |
| parent | 3843154598a00408f4214a68bd536fdf27b1df10 (diff) | |
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 'fs/f2fs/super.c')
| -rw-r--r-- | fs/f2fs/super.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 475560e5ee71..1bd915362154 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -184,6 +184,7 @@ F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards); F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy); F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util); F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search); +F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level); #define ATTR_LIST(name) (&f2fs_attr_##name.attr) static struct attribute *f2fs_attrs[] = { @@ -196,6 +197,7 @@ static struct attribute *f2fs_attrs[] = { ATTR_LIST(ipu_policy), ATTR_LIST(min_ipu_util), ATTR_LIST(max_victim_search), + ATTR_LIST(dir_level), NULL, }; @@ -359,6 +361,9 @@ static struct inode *f2fs_alloc_inode(struct super_block *sb) if (test_opt(F2FS_SB(sb), INLINE_XATTR)) set_inode_flag(fi, FI_INLINE_XATTR); + /* Will be used by directory only */ + fi->i_dir_level = F2FS_SB(sb)->dir_level; + return &fi->vfs_inode; } @@ -785,6 +790,8 @@ static void init_sb_info(struct f2fs_sb_info *sbi) for (i = 0; i < NR_COUNT_TYPE; i++) atomic_set(&sbi->nr_pages[i], 0); + + sbi->dir_level = DEF_DIR_LEVEL; } /* |