From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753059AbaIXUgh (ORCPT ); Wed, 24 Sep 2014 16:36:37 -0400 Received: from mx.treblig.org ([80.68.94.177]:37032 "EHLO mx.treblig.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751012AbaIXUgg (ORCPT ); Wed, 24 Sep 2014 16:36:36 -0400 X-Greylist: delayed 1085 seconds by postgrey-1.27 at vger.kernel.org; Wed, 24 Sep 2014 16:36:36 EDT Date: Wed, 24 Sep 2014 21:18:27 +0100 From: "Dr. David Alan Gilbert" To: Marcin Gibula Cc: linux-kernel@vger.kernel.org, aarcange@redhat.com Subject: Re: 3.16.1 - general protection fault Message-ID: <20140924201827.GA30643@gallifrey> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Chocolate: 70 percent or better cocoa solids preferably X-Operating-System: Linux/3.2.60-kvm-i386-20140609 (i686) X-Uptime: 21:12:07 up 62 days, 3:36, 1 user, load average: 0.04, 0.09, 0.07 User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Marcin Gibula (m.gibula@gmail.com) wrote: Hi Marcin, > Hi, > > I've been playing with 3.16 kernel on my test machine as a KVM > hypervisor and encountered the following crash twice (almost identical > backtraces). > > Sep 24 09:39:31 dev4 kernel: general protection fault: 0000 [#1] SMP > This machine is serving as NFS client and KVM hypervisor. I'm still > not sure how to trigger it reliably (right now, I just have to run > ubuntu instalation in VM guest multiple times and sometimes it > triggers). > > Attaching .config, slub.s and disassembled __kmalloc_node_track_caller function. Yes, I hit something similar: http://www.spinics.net/lists/linux-nfs/msg46047.html 'nfs: disallow duplicate pages in pgio page vectors' http://www.spinics.net/lists/linux-nfs/msg46048.html 'nfs: can_coalesce_requests must enforce contiguity' seem to stop the GPF's/crashes, although there's still something else going on with a corruption I'm seeing every so often. Dave -- -----Open up your eyes, open up your mind, open up your code ------- / Dr. David Alan Gilbert | Running GNU/Linux | Happy \ \ gro.gilbert @ treblig.org | | In Hex / \ _________________________|_____ http://www.treblig.org |_______/