From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Lieven Subject: Re: race between kvm-kmod-3.0 and kvm-kmod-3.3 // was: race condition in qemu-kvm-1.0.1 Date: Tue, 03 Jul 2012 15:15:04 +0200 Message-ID: <4FF2F058.1010601@dlhnet.de> 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> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Jan Kiszka , qemu-devel@nongnu.org, kvm@vger.kernel.org, Gleb Natapov To: Avi Kivity Return-path: Received: from ssl.dlhnet.de ([91.198.192.8]:55283 "EHLO ssl.dlh.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932412Ab2GCNPF (ORCPT ); Tue, 3 Jul 2012 09:15:05 -0400 In-Reply-To: <4FF2EFE0.2090400@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: 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? thanks, peter