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authorJaegeuk Kim <jaegeuk.kim@samsung.com>2014-03-20 19:10:08 +0900
committerJaegeuk Kim <jaegeuk.kim@samsung.com>2014-03-20 22:10:11 +0900
commitd928bfbfe77aa457b765c19e9db8cd4cc72b3c89 (patch)
treef56763175e0fbee1e2079c9a330f3d73f971bc5c /fs/f2fs/xattr.c
parent58c410351eba3d24f741c85a0eb9eaf15c94047d (diff)
downloadblackbird-op-linux-d928bfbfe77aa457b765c19e9db8cd4cc72b3c89.tar.gz
blackbird-op-linux-d928bfbfe77aa457b765c19e9db8cd4cc72b3c89.zip
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/xattr.c')
-rw-r--r--fs/f2fs/xattr.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
index 89d0422a91a8..84191307a670 100644
--- a/fs/f2fs/xattr.c
+++ b/fs/f2fs/xattr.c
@@ -590,7 +590,10 @@ int f2fs_setxattr(struct inode *inode, int name_index, const char *name,
f2fs_balance_fs(sbi);
f2fs_lock_op(sbi);
+ /* protect xattr_ver */
+ down_write(&F2FS_I(inode)->i_sem);
err = __f2fs_setxattr(inode, name_index, name, value, value_len, ipage);
+ up_write(&F2FS_I(inode)->i_sem);
f2fs_unlock_op(sbi);
return err;
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