From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: KVM guest crashes Date: Wed, 21 Jan 2009 11:05:16 +0200 Message-ID: <4976E54C.4080407@redhat.com> References: <4975F26D.707@suse.de> <49762F13.5040507@redhat.com> <4976D954.9070901@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: "kvm@vger.kernel.org" , Marcelo Tosatti , Joerg Roedel , Sheng Yang To: Alexander Graf Return-path: Received: from mx2.redhat.com ([66.187.237.31]:43620 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752834AbZAUJFY (ORCPT ); Wed, 21 Jan 2009 04:05:24 -0500 In-Reply-To: <4976D954.9070901@suse.de> Sender: kvm-owner@vger.kernel.org List-ID: Alexander Graf wrote: > Avi Kivity wrote: > >> Alexander Graf wrote: >> >>> The guest kernels included here are openSUSE 11.0 (2.6.25) and 11.1 >>> (2.6.27) kernels. >>> >>> Find the tests here: http://alex.csgraf.de/kvm-tests.tar.bz2 >>> And some logs here (NPT enabled): http://alex.csgraf.de/kvm-logs.tar.bz2 >>> >>> I'm somewhat lost on the reason for these failures, so if you do have >>> some time on your hands, please give me a hand debugging this! If I'd >>> had to guess, I'd say it's either an APIC issue and/or guest memory >>> corruption. >>> >>> >> I'd guess memory corruption. >> >> Does running a uniprocessor guest help? What about a uniprocessor >> guest pinned to one host core? >> > > So last night I started several guests with -smp 8 but without network > to see if IO load is causing the problems. All VMs are down, but one > panic log is rather new: > > Stuck ?? > Stuck ?? > Stuck ?? > Stuck ?? > Stuck ?? > Stuck ?? > BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 > IP: [] cpu_attach_domain+0x84/0x207 > This is right on startup, if I read things right. I suggest checking if you have the latest BIOS update applied. I've had bad experiences with un-updated processors. -- error compiling committee.c: too many arguments to function