[linux-yocto] [PATCH 08/10] fs: Only Reschedule the Write Lock if Needed.

[Daniel Dragomir]

From: John Jacques <john.jacques at intel.com>

Signed-off-by: John Jacques <john.jacques at intel.com>
---
 fs/fs-writeback.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 32a8bbd..478ab4e 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -762,7 +762,10 @@ static long writeback_sb_inodes(struct super_block *sb,
 		requeue_inode(inode, wb, &wbc);
 		inode_sync_complete(inode);
 		spin_unlock(&inode->i_lock);
-		cond_resched_lock(&wb->list_lock);
+
+		if (spin_needbreak(&wb->list_lock))
+			cond_resched_lock(&wb->list_lock);
+
 		/*
 		 * bail out to wb_writeback() often enough to check
 		 * background threshold and other termination conditions.
-- 
1.9.1