From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id q4LInpL0244376 for ; Mon, 21 May 2012 13:49:51 -0500 Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id 1hOqkfNTc7Il0BST for ; Mon, 21 May 2012 11:49:50 -0700 (PDT) Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q4LInn7C027307 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Mon, 21 May 2012 14:49:49 -0400 From: Brian Foster Subject: [RFC PATCH v2 2/3] xfs: fix xfsaild hang due to premature idle Date: Mon, 21 May 2012 14:49:28 -0400 Message-Id: <1337626169-21730-3-git-send-email-bfoster@redhat.com> In-Reply-To: <1337626169-21730-1-git-send-email-bfoster@redhat.com> References: <1337626169-21730-1-git-send-email-bfoster@redhat.com> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: xfs@oss.sgi.com Cc: Brian Foster Running xfstests 273 in a loop reproduces an XFS lockup due to xfsaild entering idle mode indefinitely. The following high-level sequence of events lead to the hang: - xfsaild is running, hits the stuck item threshold and reschedules, setting xa_last_pushed_lsn appropriately. - xa_threshold is updated. - xfsaild restarts from the previous xa_last_pushed_lsn, hits the new target and enters idle mode, even though the previously stuck items still populate the ail. Modify the tout logic to only enter idle mode when the ail is empty. IOW, if we hit the target but did not perform the current scan from the start of the ail, reschedule at least one more time. Signed-off-by: Brian Foster --- fs/xfs/xfs_trans_ail.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c index ae620eb..8bc8aa2 100644 --- a/fs/xfs/xfs_trans_ail.c +++ b/fs/xfs/xfs_trans_ail.c @@ -503,7 +503,7 @@ xfsaild_push( /* assume we have more work to do in a short while */ out_done: - if (!count) { + if (!count && !ailp->xa_last_pushed_lsn) { /* We're past our target or empty, so idle */ ailp->xa_last_pushed_lsn = 0; ailp->xa_log_flush = 0; -- 1.7.7.6 _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs