Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751567Ab0DUGUW (ORCPT ); Wed, 21 Apr 2010 02:20:22 -0400 Received: from mail.skyhub.de ([78.46.96.112]:59983 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750780Ab0DUGUU (ORCPT ); Wed, 21 Apr 2010 02:20:20 -0400 Date: Wed, 21 Apr 2010 08:20:15 +0200 From: Borislav Petkov To: "Rafael J. Wysocki" Cc: Rik van Riel , Linux Kernel Mailing List , Kernel Testers List , Maciej Rutecki , Kent Overstreet , Ingo Molnar , Peter Zijlstra Subject: Re: [Bug #15672] KVM bug, git bisected Message-ID: <20100421062015.GB3839@liondog.tnic> Mail-Followup-To: Borislav Petkov , "Rafael J. Wysocki" , Rik van Riel , Linux Kernel Mailing List , Kernel Testers List , Maciej Rutecki , Kent Overstreet , Ingo Molnar , Peter Zijlstra References: <4BCE188A.1060408@redhat.com> <4BCE72D6.6010809@redhat.com> <201004210702.02129.rjw@sisk.pl> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <201004210702.02129.rjw@sisk.pl> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1750 Lines: 46 From: "Rafael J. Wysocki" Date: Wed, Apr 21, 2010 at 07:02:02AM +0200 > On Wednesday 21 April 2010, Rik van Riel wrote: > > On 04/20/2010 05:11 PM, Rik van Riel wrote: > > > On 04/19/2010 11:19 PM, Rafael J. Wysocki wrote: > > >> This message has been generated automatically as a part of a summary > > >> report > > >> of recent regressions. > > >> > > >> The following bug entry is on the current list of known regressions > > >> from 2.6.33. Please verify if it still should be listed and let the > > >> tracking team > > >> know (either way). > > >> > > >> > > >> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=15672 > > >> Subject : KVM bug, git bisected > > >> Submitter : Kent Overstreet > > >> Date : 2010-03-27 12:43 (24 days old) > > >> First-Bad-Commit: > > >> http://kernel.org/git/linus/5beb49305251e5669852ed541e8e2f2f7696c53e > > >> Message-ID :<4BADFD74.8060904@gmail.com> > > >> References : http://marc.info/?l=linux-kernel&m=126969385121711&w=2 > > > > > > Should be fixed by commit ea90002b0fa7bdee86ec22eba1d951f30bf043a6 > > > > Never mind me - this is a harmless (but loud) overflow > > of PREEMPT_BITS in the preempt count. > > OK, what am I supposed to do with this entry, then? Close? FWIW, I hit that warning too when chasing the anon_vma regression. It seems on certain workloads (for me it was several kvm guests) we're close to max preemption depth. Anyway, adding some more people to Cc. -- Regards/Gruss, Boris. -- 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/