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authorChristoph Hellwig <hch@infradead.org>2011-10-11 19:14:08 +0400
committerAlex Elder <aelder@sgi.com>2011-10-11 20:02:48 +0400
commitbc6e588a8971aa74c02e42db4d6e0248679f3738 (patch)
treea9c8361b9f2d5b0364f5f4c3433e413b8f434dac /fs/xfs/xfs_trans_ail.c
parent65112dccf8a113737684366349d7f9ec373ddc47 (diff)
downloadlinux-bc6e588a8971aa74c02e42db4d6e0248679f3738.tar.xz
xfs: do not update xa_last_pushed_lsn for locked items
If an item was locked we should not update xa_last_pushed_lsn and thus skip it when restarting the AIL scan as we need to be able to lock and write it out as soon as possible. Otherwise heavy lock contention might starve AIL pushing too easily, especially given the larger backoff once we moved xa_last_pushed_lsn all the way to the target lsn. Signed-off-by: Christoph Hellwig <hch@lst.de> Reported-by: Stefan Priebe <s.priebe@profihost.ag> Tested-by: Stefan Priebe <s.priebe@profihost.ag> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_trans_ail.c')
-rw-r--r--fs/xfs/xfs_trans_ail.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c
index c15aa29fa169..9bd1ee55ef6a 100644
--- a/fs/xfs/xfs_trans_ail.c
+++ b/fs/xfs/xfs_trans_ail.c
@@ -440,7 +440,6 @@ xfs_ail_worker(
case XFS_ITEM_LOCKED:
XFS_STATS_INC(xs_push_ail_locked);
- ailp->xa_last_pushed_lsn = lsn;
stuck++;
break;