f2fs: pin files do not require sbi->writepages lock for ordering

For pinned files, the file mapping is already established before
writing, and since the writes are in IPU, there is no need to acquire
the sbi->writepages lock to guarantee write ordering.

Signed-off-by: Yongpeng Yang <yangyongpeng@xiaomi.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 9ef875e7b34c19642cc661cac8aacd7f52165c99..84746a06cd5824ced351bc3bad35e155b329fb30 100644 (file)
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -3477,6 +3477,8 @@ static inline bool __should_serialize_io(struct inode *inode,
        if (IS_NOQUOTA(inode))
                return false;
 
+       if (f2fs_is_pinned_file(inode))
+               return false;
        if (f2fs_need_compress_data(inode))
                return true;
        if (wbc->sync_mode != WB_SYNC_ALL)