From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([208.118.235.92]:58835)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <pl@dlhnet.de>) id 1UQAl8-0001Em-HP
	for qemu-devel@nongnu.org; Thu, 11 Apr 2013 02:13:25 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <pl@dlhnet.de>) id 1UQAl5-0001eW-St
	for qemu-devel@nongnu.org; Thu, 11 Apr 2013 02:13:22 -0400
Received: from ssl.dlhnet.de ([91.198.192.8]:44302 helo=ssl.dlh.net)
	by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from <pl@dlhnet.de>)
	id 1UQAl5-0001eE-NE
	for qemu-devel@nongnu.org; Thu, 11 Apr 2013 02:13:19 -0400
Message-ID: <5166547D.1090805@dlhnet.de>
Date: Thu, 11 Apr 2013 08:13:17 +0200
From: Peter Lieven <pl@dlhnet.de>
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Subject: [Qemu-devel] Lost network with rtl8139 / qemu-kvm 1.2.0
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, "Michael S. Tsirkin" <mst@redhat.com>

Hi all,

I have a strange problem with a few old VMs running with Windows XP (and in this case a Win2008 R2 Server) that occasionally loose network connectivity.

The tap device shows increasing drops:
tap36     Link encap:Ethernet  HWaddr b2:84:23:c0:e2:c0
           inet6 addr: fe80::b084:23ff:fec0:e2c0/64 Scope:Link
           UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
           RX packets:5816096 errors:0 dropped:0 overruns:0 frame:0
           TX packets:3878744 errors:0 dropped:13775 overruns:0 carrier:0
           collisions:0 txqueuelen:500
           RX bytes:5161769434 (5.1 GB)  TX bytes:380415916 (380.4 MB)

I see this kinf of error only with Windows XP. All other VMs running fine. If I live migrate the VM to another
Node connectivity is restored. Rebooting the VM does not help.

The vServer still uses qemu-kvm-1.2.0, but all recent fixes to rtl8139 have been backported. The tap device
is also already running with IFF_ONE_QUEUE.

Any ideas?

Thank you,
Peter