From: Christoph Hellwig <hch@lst.de>
Date: Fri, 28 Oct 2011 08:03:41 +0000 (+0200)
Subject: vfs: fix spinning prevention in prune_icache_sb
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=62a3ddef6181d7d932c565d97552d2f7b9ab4d28;p=deliverable%2Flinux.git

vfs: fix spinning prevention in prune_icache_sb

We need to move the inode to the end of the list to actually make the
spinning prevention explained in the comment above it work.  With a
plain list_move it will simply stay in place as we're always reclaiming
from the head of the list.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---

diff --git a/fs/inode.c b/fs/inode.c
index ec7924696a13..ecbb68dc7e2a 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -634,7 +634,7 @@ 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(&inode->i_lru, &sb->s_inode_lru);
+			list_move_tail(&inode->i_lru, &sb->s_inode_lru);
 			continue;
 		}