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 q2L4UYtD047455 for ; Tue, 20 Mar 2012 23:30:35 -0500 Received: from ipmail04.adl6.internode.on.net (ipmail04.adl6.internode.on.net [150.101.137.141]) by cuda.sgi.com with ESMTP id gZp427cqSfbdWpHJ for ; Tue, 20 Mar 2012 21:30:33 -0700 (PDT) Date: Wed, 21 Mar 2012 15:30:31 +1100 From: Dave Chinner Subject: Re: kernel: XFS (dm-7): xlog_space_left: head behind tail Message-ID: <20120321043031.GW5091@dastard> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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: Gregory Machin Cc: xfs@oss.sgi.com On Wed, Mar 21, 2012 at 05:00:02PM +1300, Gregory Machin wrote: > I have a CentOS 6.2 virtual machine in a vmware ESXi 4.0 host 4G Ram 4 > virtaul cpus and with about 4 TB of disk space formatted with XFS . > I'm seeing a lot of : > > Mar 21 10:49:42 nzhmlfpr05 kernel: XFS (dm-4): xlog_space_left: head behind tail > Mar 21 10:49:42 nzhmlfpr05 kernel: tail_cycle = 129, tail_bytes = 20163072 > Mar 21 10:49:42 nzhmlfpr05 kernel: GH cycle = 129, GH bytes = 20162880 > Mar 21 10:49:42 nzhmlfpr05 kernel: XFS (dm-7): xlog_space_left: head behind tail > Mar 21 10:49:42 nzhmlfpr05 kernel: tail_cycle = 5, tail_bytes = 333417984 > Mar 21 10:49:42 nzhmlfpr05 kernel: GH cycle = 5, GH bytes = 333417792 > Mar 21 10:49:42 nzhmlfpr05 kernel: XFS (dm-7): xlog_space_left: head behind tail > Mar 21 10:49:42 nzhmlfpr05 kernel: tail_cycle = 5, tail_bytes = 333417984 > Mar 21 10:49:42 nzhmlfpr05 kernel: GH cycle = 5, GH bytes = 333417792 can you send the complete set of output, including the first occurrence of it? What workload are you running? Are you freezing you filesystem frequently? > What would casue this ? A quick google , I found a post that indicated > I should unmount and mount the file systems. I have live production > data on this machine so I need to be careful. What is the best > solution ? Best solution? I don't know enough about the problem yet to suggest one. Cheers, Dave. -- Dave Chinner david@fromorbit.com _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs