path: root/fs/inode.c
diff options
authorSuleiman Souhlal <suleiman@google.com>2013-04-13 16:03:06 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-04-13 16:13:55 -0700
commit5b55d708335a9e3e4f61f2dadf7511502205ccd1 (patch)
tree83e4687e7be804ede22f993a901264dddb001018 /fs/inode.c
parenta49b7e82cab0f9b41f483359be83f44fbb6b4979 (diff)
vfs: Revert spurious fix to spinning prevention in prune_icache_sb
Revert commit 62a3ddef6181 ("vfs: fix spinning prevention in prune_icache_sb"). This commit doesn't look right: since we are looking at the tail of the list (sb->s_inode_lru.prev) if we want to skip an inode, we should put it back at the head of the list instead of the tail, otherwise we will keep spinning on it. Discovered when investigating why prune_icache_sb came top in perf reports of a swapping load. Signed-off-by: Suleiman Souhlal <suleiman@google.com> Signed-off-by: Hugh Dickins <hughd@google.com> Cc: stable@vger.kernel.org # v3.2+ Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/inode.c')
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/inode.c b/fs/inode.c
index f5f7c06c36f..a898b3d43cc 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -725,7 +725,7 @@ void prune_icache_sb(struct super_block *sb, int nr_to_scan)
* inode to the back of the list so we don't spin on it.
if (!spin_trylock(&inode->i_lock)) {
- list_move_tail(&inode->i_lru, &sb->s_inode_lru);
+ list_move(&inode->i_lru, &sb->s_inode_lru);