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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>
This commit is contained in:
Jaegeuk Kim 2016-04-13 16:14:38 -07:00
parent c27753d675
commit eca76e783c
1 changed files with 7 additions and 3 deletions
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10
fs/f2fs/node.c
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@ -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)
lock_page(page);
else if (!trylock_page(page))
if (ino) {
if (ino_of_node(page) == ino)
lock_page(page);
else
continue;
} else if (!trylock_page(page)) {
continue;
}
if (unlikely(page->mapping != NODE_MAPPING(sbi))) {
continue_unlock: