From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:42849) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SyMjW-0007E7-G6 for qemu-devel@nongnu.org; Mon, 06 Aug 2012 08:48:31 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1SyMjV-0002JC-DM for qemu-devel@nongnu.org; Mon, 06 Aug 2012 08:48:30 -0400 Received: from mx1.redhat.com ([209.132.183.28]:1290) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SyMjV-0002J7-4x for qemu-devel@nongnu.org; Mon, 06 Aug 2012 08:48:29 -0400 Message-ID: <501FBD14.6030508@redhat.com> Date: Mon, 06 Aug 2012 15:48:20 +0300 From: Avi Kivity MIME-Version: 1.0 References: <5017C8A0.60506@profihost.ag> <5017F19E.4070308@redhat.com> <501817C9.6090405@profihost.ag> <5018EC7D.9090702@redhat.com> <5018F5BB.9070500@profihost.ag> <5018F7E6.4020909@redhat.com> <5018F9F6.70307@profihost.ag> <5018FC9B.8040808@redhat.com> <501E4615.7060801@profihost.ag> <501E4AFD.3020806@redhat.com> <501E96BB.5060702@profihost.ag> <501EC2E2.8010802@profihost.ag> <501F8226.9090500@redhat.com> <501F846C.50903@profihost.ag> <501FB4A8.6080609@redhat.com> <501FBAA2.6050205@redhat.com> In-Reply-To: <501FBAA2.6050205@redhat.com> Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] KVM segfaults with 3.5 while installing ubuntu 12.04 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Stefan Priebe - Profihost AG Cc: Kevin Wolf , Stefan Hajnoczi , kvm@vger.kernel.org, mtosatti@redhat.com, qemu-devel , linux-kernel On 08/06/2012 03:37 PM, Avi Kivity wrote: > On 08/06/2012 03:12 PM, Avi Kivity wrote: >> On 08/06/2012 11:46 AM, Stefan Priebe - Profihost AG wrote: >> >>> But still i got the segfault and core dump - this is my main problem? I >>> mean qemu-kvm master isn't declared as stable. So i don't care about the >>> slowness here. >>> >>> What can we do about the core dump and crash? >> >> Okay, I reproduced it; it seems aio=native is the culprit. You can try >> aio=threads as a workaround. >> >> Copying some relevant people (context: aio=native on qemu-kvm-1.1.1 >> segfaults pretty early during guest install) >> > > The following ought to fix it: It does. Kevin: despite aio=native, I get iothreads and pwrites, something is broken. -- error compiling committee.c: too many arguments to function