From eca76e783cf5970db36edfda7e66487d897ea222 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Wed, 13 Apr 2016 16:14:38 -0700 Subject: [PATCH] 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 Signed-off-by: Jaegeuk Kim --- fs/f2fs/node.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index 095fc2c..cccee500 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -1272,10 +1272,14 @@ next_step: * 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: -- 2.7.4