From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Hajnoczi Subject: Re: [Bug 60620] guest loses frequently (multiple times per day!) connectivity to network device Date: Fri, 2 Aug 2013 14:34:06 +0200 Message-ID: <20130802123406.GB342@stefanha-thinkpad.redhat.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: kvm@vger.kernel.org To: bugzilla-daemon@bugzilla.kernel.org Return-path: Received: from mail-wg0-f50.google.com ([74.125.82.50]:59121 "EHLO mail-wg0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752476Ab3HBMeK (ORCPT ); Fri, 2 Aug 2013 08:34:10 -0400 Received: by mail-wg0-f50.google.com with SMTP id m15so464823wgh.29 for ; Fri, 02 Aug 2013 05:34:09 -0700 (PDT) Content-Disposition: inline In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: On Fri, Aug 02, 2013 at 11:28:45AM +0000, bugzilla-daemon@bugzilla.kernel.org wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=60620 > > --- Comment #9 from Folkert van Heusden --- > Good news! > If I > > - bring down all interfaces in the guest (ifdown eth0...) > - rmmod virtio_net > - modprobe virtio_net > - bring up the interfaces again > + it all works again! > > So hopefully this helps the bug hunt? Hi Folkert, Please post the QEMU command-line on the host (ps aux | grep qemu) and the output of lsmod | grep vhost_net. Since reinitializing the guest driver "fixes" the issue, we now need to find out whether the guest or the host side got stuck. I think I asked before, but please also post any relevant lines from dmesg on the host and from the guest. Examples would include networking error messages, kernel backtraces, or out-of-memory errors. Thanks, Stefan