From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: kernel bug in kvm_intel Date: Tue, 13 Oct 2009 08:50:07 +0200 Message-ID: <4AD4231F.6040608@redhat.com> References: <4ACF9745.3050902@linux.vnet.ibm.com> <4AD16ACE.6040903@redhat.com> <1255372957.4883.49.camel@twinturbo.austin.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org To: habanero@linux.vnet.ibm.com Return-path: Received: from mx1.redhat.com ([209.132.183.28]:30126 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757454AbZJMGuk (ORCPT ); Tue, 13 Oct 2009 02:50:40 -0400 In-Reply-To: <1255372957.4883.49.camel@twinturbo.austin.ibm.com> Sender: kvm-owner@vger.kernel.org List-ID: On 10/12/2009 08:42 PM, Andrew Theurer wrote: > On Sun, 2009-10-11 at 07:19 +0200, Avi Kivity wrote: > >> On 10/09/2009 10:04 PM, Andrew Theurer wrote: >> >>> This is on latest master branch on kvm.git and qemu-kvm.git, running >>> 12 Windows Server2008 VMs, and using oprofile. I ran again without >>> oprofile and did not get the BUG. I am wondering if anyone else is >>> seeing this. >>> >>> Thanks, >>> >>> -Andrew >>> >>> >>>> Oct 9 11:55:13 virtvictory-eth0 kernel: BUG: unable to handle kernel >>>> paging request at ffffffff9fe9a2b4 >>>> Oct 9 11:55:13 virtvictory-eth0 kernel: IP: [] >>>> vmx_vcpu_run+0x26d/0x64f [kvm_intel] >>>> >> Can you run this through objdump or gdb to see what source this >> corresponds to? >> >> > Somewhere here I think (?) > > objdump -d > Look at the address where vmx_vcpu_run starts, add 0x26d, and show the surrounding code. Thinking about it, it probably _is_ what you showed, due to module page alignment. But please verify this; I can't reconcile the fault address (ffffffff9fe9a2b) with %rsp at the time of the fault. -- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain.