From d5b692b786e1aea68d2c6737dd0abeebc1dad619 Mon Sep 17 00:00:00 2001 From: Chao Yu Date: Thu, 30 Apr 2015 18:35:50 +0800 Subject: [PATCH] f2fs: do not re-lookup nat cache with same nid In set_node_addr, we try to lookup cached nat entry of inode and then set flag in it. But previously in this function, we have already grabbed nat entry with current node id, if the node id is the same as the one of inode, we do not need to lookup it in cache again. So this patch adds condition judgment for reducing unneeded lookup. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim --- fs/f2fs/node.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index 62982e671d18..771725650c0d 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -315,7 +315,8 @@ static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni, __set_nat_cache_dirty(nm_i, e); /* update fsync_mark if its inode nat entry is still alive */ - e = __lookup_nat_cache(nm_i, ni->ino); + if (ni->nid != ni->ino) + e = __lookup_nat_cache(nm_i, ni->ino); if (e) { if (fsync_done && ni->nid == ni->ino) set_nat_flag(e, HAS_FSYNCED_INODE, true); -- 2.20.1