From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail137.messagelabs.com (mail137.messagelabs.com [216.82.249.19]) by kanga.kvack.org (Postfix) with SMTP id A20526B00C7 for ; Tue, 9 Nov 2010 00:33:19 -0500 (EST) Received: from m3.gw.fujitsu.co.jp ([10.0.50.73]) by fgwmail7.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id oA95XHBj010750 for (envelope-from kosaki.motohiro@jp.fujitsu.com); Tue, 9 Nov 2010 14:33:17 +0900 Received: from smail (m3 [127.0.0.1]) by outgoing.m3.gw.fujitsu.co.jp (Postfix) with ESMTP id DBC7845DE4F for ; Tue, 9 Nov 2010 14:33:16 +0900 (JST) Received: from s3.gw.fujitsu.co.jp (s3.gw.fujitsu.co.jp [10.0.50.93]) by m3.gw.fujitsu.co.jp (Postfix) with ESMTP id BD58045DE4E for ; Tue, 9 Nov 2010 14:33:16 +0900 (JST) Received: from s3.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s3.gw.fujitsu.co.jp (Postfix) with ESMTP id A6D5D1DB8037 for ; Tue, 9 Nov 2010 14:33:16 +0900 (JST) Received: from ml14.s.css.fujitsu.com (ml14.s.css.fujitsu.com [10.249.87.104]) by s3.gw.fujitsu.co.jp (Postfix) with ESMTP id 61F651DB803C for ; Tue, 9 Nov 2010 14:33:13 +0900 (JST) From: KOSAKI Motohiro Subject: Re: "BUG: soft lockup - CPU#0 stuck for 61s! [kswapd0:184]" In-Reply-To: References: Message-Id: <20101109142733.BC69.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit Date: Tue, 9 Nov 2010 14:33:12 +0900 (JST) Sender: owner-linux-mm@kvack.org To: Luke Hutchison Cc: kosaki.motohiro@jp.fujitsu.com, linux-kernel@vger.kernel.org, linux-mm , Mel Gorman List-ID: > Hi, > > I just wanted to report a bug upstream that is affecting the latest > versions of at least both Fedora and Ubuntu. CPUs somehow lock up > under load, producing errors of the form "BUG: soft lockup - CPU#0 > stuck for 61s! [kswapd0:184]" > > The Fedora Bug report is here: > https://bugzilla.redhat.com/show_bug.cgi?id=649694 -- however you can > find lots of references to the error message on other distributions > (including Ubuntu) by googling "bug soft lockup cpu stuck". > > Lockups seem to happen on server-class hardware under heavy loads when > the machine is swapping. This can lead to the entire machine locking > up in some reported cases (although so far only individual CPUs seem > to have locked up in my case, not the entire machine). The point at > which the CPU hangs varies -- see the dmesg output I attached to the > Fedora bug report above. > > My machine is a 12-way Xeon X5680 system with ext3, AFS and XFS > filesystems (XFS is running on hardware RAID). Please let me know if > you need other info that would be helpful to diagnosing the problem. AFAIK, This isssue was already fixed by Mel. http://kerneltrap.org/mailarchive/linux-kernel/2010/10/27/4637977 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: email@kvack.org