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| author | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2014-03-20 19:10:08 +0900 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2014-03-20 22:10:11 +0900 |
| commit | d928bfbfe77aa457b765c19e9db8cd4cc72b3c89 (patch) | |
| tree | f56763175e0fbee1e2079c9a330f3d73f971bc5c /fs/f2fs/namei.c | |
| parent | 58c410351eba3d24f741c85a0eb9eaf15c94047d (diff) | |
| download | linux-d928bfbfe77aa457b765c19e9db8cd4cc72b3c89.tar.bz2 | |
f2fs: introduce fi->i_sem to protect fi's info
This patch introduces fi->i_sem to protect fi's info that includes xattr_ver,
pino, i_nlink.
This enables to remove i_mutex during f2fs_sync_file, resulting in performance
improvement when a number of fsync calls are triggered from many concurrent
threads.
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs/namei.c')
| -rw-r--r-- | fs/f2fs/namei.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c index 397d459e97bf..0cea87437a60 100644 --- a/fs/f2fs/namei.c +++ b/fs/f2fs/namei.c @@ -424,12 +424,17 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, } f2fs_set_link(new_dir, new_entry, new_page, old_inode); + down_write(&F2FS_I(old_inode)->i_sem); F2FS_I(old_inode)->i_pino = new_dir->i_ino; + up_write(&F2FS_I(old_inode)->i_sem); new_inode->i_ctime = CURRENT_TIME; + down_write(&F2FS_I(new_inode)->i_sem); if (old_dir_entry) drop_nlink(new_inode); drop_nlink(new_inode); + up_write(&F2FS_I(new_inode)->i_sem); + mark_inode_dirty(new_inode); if (!new_inode->i_nlink) @@ -459,7 +464,9 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, if (old_dir != new_dir) { f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); + down_write(&F2FS_I(old_inode)->i_sem); F2FS_I(old_inode)->i_pino = new_dir->i_ino; + up_write(&F2FS_I(old_inode)->i_sem); update_inode_page(old_inode); } else { kunmap(old_dir_page); |