f2fs: avoid needless lock for node pages when fsyncing a file



When fsync is called, sync_node_pages finds a proper direct node pages to flush.
But, it locks unrelated direct node pages together unnecessarily.

Acked-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

parent c27753d6

fs/f2fs/node.c

+7 −3

Original line number	Diff line number	Diff line
		@@ -1272,10 +1272,14 @@ int sync_node_pages(struct f2fs_sb_info *sbi, nid_t ino,
		* we should not skip writing node pages.
		*/
		lock_node:
		if (ino && ino_of_node(page) == ino)
		if (ino) {
		if (ino_of_node(page) == ino)
		lock_page(page);
		else if (!trylock_page(page))
		else
		continue;
		} else if (!trylock_page(page)) {
		continue;
		}

		if (unlikely(page->mapping != NODE_MAPPING(sbi))) {
		continue_unlock: