From: Jaegeuk Kim <jaegeuk@xxxxxxxxxx> [ Upstream commit 0df035c7208c5e3e2ae7685548353ae536a19015 ] Let's cache nat entry if there's no lock contention only. Reviewed-by: Chao Yu <chao@xxxxxxxxxx> Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx> Stable-dep-of: 3aa51c61cb4a ("f2fs: retry to update the inode page given data corruption") Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- fs/f2fs/node.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index f810c6bbeff02..7f00f3004a665 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -430,6 +430,10 @@ static void cache_nat_entry(struct f2fs_sb_info *sbi, nid_t nid, struct f2fs_nm_info *nm_i = NM_I(sbi); struct nat_entry *new, *e; + /* Let's mitigate lock contention of nat_tree_lock during checkpoint */ + if (rwsem_is_locked(&sbi->cp_global_sem)) + return; + new = __alloc_nat_entry(sbi, nid, false); if (!new) return; -- 2.39.2