From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Daniel P. Berrange" Subject: Re: [libvirt-users] libvirt & virtio_net - host.freeze@reset.domain Date: Wed, 3 Jul 2013 12:43:28 +0100 Message-ID: <20130703114327.GW2778@redhat.com> References: <51D2B8A1.9050002@gmail.com> Reply-To: "Daniel P. Berrange" Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Cc: libvir-list@redhat.com, netdev@vger.kernel.org, libvirt-users@redhat.com To: poma Return-path: Received: from mx1.redhat.com ([209.132.183.28]:7341 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752503Ab3GCLne (ORCPT ); Wed, 3 Jul 2013 07:43:34 -0400 Content-Disposition: inline In-Reply-To: <51D2B8A1.9050002@gmail.com> Sender: netdev-owner@vger.kernel.org List-ID: On Tue, Jul 02, 2013 at 01:25:21PM +0200, poma wrote: > Hello people, > > libvirtd (libvirt) 1.0.5.2 > virsh 1.0.5.2 > virt-manager 0.10.0 > > Host: > Linux localhost 3.9.8-300.fc19.x86_64 #1 SMP Thu Jun 27 19:24:23 UTC > 2013 x86_64 x86_64 x86_64 GNU/Linux > Guest1: > Linux localhost 3.9.8-300.fc19.i686.PAE #1 SMP Thu Jun 27 19:29:30 UTC > 2013 i686 (none) > Guest2: > Linux localhost 3.9.8-300.fc19.x86_64 #1 SMP Thu Jun 27 19:24:23 UTC > 2013 x86_64 x86_64 x86_64 GNU/Linux > > > Virtual NIC - source & model: > macvtap/NAT/bridge & virtio(virtio_net) > > Host freeze at "virsh reset " or "virt-manager - Force Reset" > Need kernel.sysrq or power reset. I don't believe this is a libvirt issue - the 'virsh reset' command will issue the 'system_reset' QEMU monitor command. This in turn does an immediate reset of the guest CPUs/machine. Even if QEMU is doing the wrong thing, the kernel should obviously never freeze/crash in this way - it should be robust against a malicious QEMU process. You should probably send this message to the main QEMU and/or KVM mailing lists so that it comes to the attention of people who are more familiar with QEMU + virtio-net Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|