From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id q16MpQBX171057 for ; Mon, 6 Feb 2012 16:51:26 -0600 Received: from mx2.suse.de (cantor2.suse.de [195.135.220.15]) by cuda.sgi.com with ESMTP id 3cK7B6aIOS5RAujU (version=TLSv1 cipher=AES256-SHA bits=256 verify=NO) for ; Mon, 06 Feb 2012 14:51:25 -0800 (PST) Date: Mon, 6 Feb 2012 23:51:22 +0100 From: Jan Kara Subject: Re: Soft lockup problem Message-ID: <20120206225122.GF24840@quack.suse.cz> 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: Gerard Saraber Cc: linux-kernel@vger.kernel.org, xfs@oss.sgi.com On Mon 06-02-12 09:40:45, Gerard Saraber wrote: > Greetings everyone, > I've been having a bit of a problem since upgrading to the linux 3.x > series, I have a machine that we're using as a NAS that runs various > rsync processes (mostly at night), lately after a day or two, I will > come in in the morning to a load average of 49, but the machine not > really doing anything, when trying to run 'dstat' the command just > hung with no output at all. there were no errors in the logs, or even > anything that would vaguely point at anything I could work with. > So needing to get the machine back to work I attempted to reboot it > "shutdown -r now" on console... it gives a nice message saying it's > going to reboot, but nothing ever happens.. the only way to reboot it > is by using ctrl + alt + sysrq + b. after which the machine reboots > and the raid array comes back clean. > > I'm not sure how to troubleshoot this, any pointers would be appreciated. > > I'm compiling 3.2.4 at the moment and found a bunch of possibly useful > options in the kernel debugging section: > detect hard/soft lockups and detect hung tasks, maybe it'll give me > something more to go on. > > Some details about the machine: > Linux xenbox 3.2.2 #1 SMP Sun Jan 29 10:28:22 CST 2012 x86_64 Intel(R) > Xeon(R) CPU 5140 @ 2.33GHz GenuineIntel GNU/Linux > It has 3 software raid arrays (2 x 5 drives and 1 x 4 drives) LVM'ed > together into a 23TB XFS filesystem. > 6GB memory and a pair of Intel Gigabit ethernet controllers bonded together. Hmm, might be some deadlock in the filesystem. Adding XFS guys to CC. Can you run 'echo w >/proc/sysrq-trigger' and post output of dmesg here? Honza -- Jan Kara SUSE Labs, CR _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs