From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:48075) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Sm37H-0002QU-KR for qemu-devel@nongnu.org; Tue, 03 Jul 2012 09:26:19 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Sm36z-0002KL-1i for qemu-devel@nongnu.org; Tue, 03 Jul 2012 09:26:07 -0400 Received: from mx1.redhat.com ([209.132.183.28]:23131) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Sm36y-0002JC-F2 for qemu-devel@nongnu.org; Tue, 03 Jul 2012 09:25:48 -0400 Message-ID: <4FF2F2D7.2050207@redhat.com> Date: Tue, 03 Jul 2012 16:25:43 +0300 From: Avi Kivity MIME-Version: 1.0 References: <4FEB2945.1030607@dlhnet.de> <4FEB3AC6.6010206@web.de> <4FEC1FC9.7050103@dlhnet.de> <4FEC2210.1030005@siemens.com> <4FEC2475.4030202@dlhnet.de> <4FEC2626.90402@dlhnet.de> <4FF1B8A6.2020101@redhat.com> <4FF2ED2A.7080300@dlhnet.de> <4FF2EFE0.2090400@redhat.com> <4FF2F058.1010601@dlhnet.de> In-Reply-To: <4FF2F058.1010601@dlhnet.de> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] race between kvm-kmod-3.0 and kvm-kmod-3.3 // was: race condition in qemu-kvm-1.0.1 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Peter Lieven Cc: Jan Kiszka , Gleb Natapov , qemu-devel@nongnu.org, kvm@vger.kernel.org On 07/03/2012 04:15 PM, Peter Lieven wrote: > On 03.07.2012 15:13, Avi Kivity wrote: >> On 07/03/2012 04:01 PM, Peter Lieven wrote: >>> Further output from my testing. >>> >>> Working: >>> Linux 2.6.38 with included kvm module >>> Linux 3.0.0 with included kvm module >>> >>> Not-Working: >>> Linux 3.2.0 with included kvm module >>> Linux 2.6.28 with kvm-kmod 3.4 >>> Linux 3.0.0 with kvm-kmod 3.4 >>> Linux 3.2.0 with kvm-kmod 3.4 >>> >>> I can trigger the race with any of qemu-kvm 0.12.5, 1.0 or 1.0.1. >>> It might be that the code was introduced somewhere between 3.0.0 >>> and 3.2.0 in the kvm kernel module and that the flaw is not >>> in qemu-kvm. >>> >>> Any hints? >>> >> A bisect could tell us where the problem is. >> >> To avoid bisecting all of linux, try >> >> git bisect v3.2 v3.0 virt/kvm arch/x86/kvm >> >> > would it also be ok to bisect kvm-kmod? Yes, but note that kvm-kmod is spread across two repositories which are not often tested out of sync, so you may get build failures. -- error compiling committee.c: too many arguments to function