From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: BUG: soft lockup - CPU#0 stuck for 13s! [swapper:0] Date: Wed, 25 Aug 2010 16:19:26 +0300 Message-ID: <4C75185E.2040006@redhat.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org, "qemu-devel@nongnu.org" To: Boris Dolgov Return-path: Received: from mx1.redhat.com ([209.132.183.28]:1268 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752468Ab0HYNTd (ORCPT ); Wed, 25 Aug 2010 09:19:33 -0400 In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: On 08/25/2010 04:15 PM, Boris Dolgov wrote: > Hello! > > I try to use KVM on slackware host and centos5 guest with SMP. > > When the server is idle, I get following errors in /var/log/messages: > http://pastebin.com/4RrMVuXq > > Guest: > [root@centos-5-x64 ~]# uname -a > Linux centos-5-x64.slave 2.6.18-194.11.1.el5 #1 SMP Tue Aug 10 > 19:05:06 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux > > Start command: /usr/local/qemu/bin/qemu-system-x86_64 -name > centos-5-x64 -m 384 -smp 2 -cdrom > /root/CentOS-5.5-x86_64-netinstall.iso -drive > index=0,media=disk,if=virtio,file=/dev/mapper/vgvm-centos5x64,boot=on > -vnc 0.0.0.0:1 -net nic,macaddr=fe:e1:de:ad:57:22 -net > tap,script=/usr/local/qemu/bin/qemu-ifup -monitor stdio -usb > -usbdevice tablet -enable-kvm > > Host: > root@superserver:~# uname -a > Linux superserver 2.6.35.3 #4 SMP Mon Aug 23 12:17:01 MSD 2010 x86_64 > Intel(R) Xeon(R) CPU X3460 @ 2.80GHz GenuineIntel GNU/Linux > root@superserver:~# /usr/local/qemu/bin/qemu-system-x86_64 -version > QEMU PC emulator version 0.12.5 (qemu-kvm-0.12.5), Copyright (c) > 2003-2008 Fabrice Bellard > > What does it mean? Looks like a bug in our USB emulation. Copying qemu-devel to see if anyone has a clue. -- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain.