From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753211Ab2GTVGR (ORCPT ); Fri, 20 Jul 2012 17:06:17 -0400 Received: from e24smtp03.br.ibm.com ([32.104.18.24]:57101 "EHLO e24smtp03.br.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752125Ab2GTVGP (ORCPT ); Fri, 20 Jul 2012 17:06:15 -0400 Date: Fri, 20 Jul 2012 18:06:06 -0300 From: Thadeu Lima de Souza Cascardo To: nicolas prochazka Cc: Dave Jones , linux-kernel Subject: Re: oops in kernel ( 3.4.x -> 3.5rc ) Message-ID: <20120720210606.GC15677@oc1711230544.ibm.com> References: <20120720132153.GA26110@redhat.com> <20120720202155.GB15677@oc1711230544.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-Content-Scanned: Fidelis XPS MAILER x-cbid: 12072021-9254-0000-0000-000009AB5DF5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jul 20, 2012 at 10:52:40PM +0200, nicolas prochazka wrote: > Hello > the problem is occured with : > - linux kernel 3.4.5 i do not test with 3.4.0 / 1 / 2 / 3 / 4 , > but i can if you want > - linux kernel 3.5rc6 rc7 / do not test with other rc. > > the problem is not occured with : > linux kernel 3.3.4 / 3.3.8 > > These servers are used for : > - starting a lot of virtual machine with qemu-kvm ( ~ 40 ) ( lot of > select i think) > - do a lot of network tests with openvswitch > > I can test a kernel 3.4.x before and after a commit id (?) to find a regression. > > Regards, > Nicolas. > Can you try this commit 1fd36adcd98c14d2fd97f545293c488775cb2823? And the commit before it? > > 2012/7/20 Thadeu Lima de Souza Cascardo : > > On Fri, Jul 20, 2012 at 09:21:53AM -0400, Dave Jones wrote: > >> On Fri, Jul 20, 2012 at 11:56:06AM +0200, nicolas prochazka wrote: > >> > >> > [ 2384.900061] BUG: unable to handle kernel paging request at 000000010000002f > >> > >> That '1' looks like a random bit flip. Try running memtest86. > >> > > > > Looks more a 32-bit value of 1 followed by a 32-bit value of 0x2f. Most > > likely a pointer to some other piece of a struct. However, taking a look > > at fs/files.c code, nothing seems suspicious. > > > > Nicolas, it wasn't clear to me if you had problems with 3.4 too. There > > has been some changes in fs/files.c on 3.4-rc1 in the piece of code > > where you hit the problem. > > > > What does your system exercise? Any chance you are using a lot of > > select, which has also been changed in those same patches to fs/files.c? > > > > Regards. > > Cascardo. > > > > > >> > [ 2384.910010] Pid: 23838, comm: queue.sh Tainted: G D W > >> > >> This wasn't the first problem either. > >> > >> > [ 2397.885344] BUG: unable to handle kernel paging request at 000000010000003b > >> > >> Looks like the same flipped bit. > >> > >> Dave > >> > >> -- > >> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > >> the body of a message to majordomo@vger.kernel.org > >> More majordomo info at http://vger.kernel.org/majordomo-info.html > >> Please read the FAQ at http://www.tux.org/lkml/ > >> > > >