From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gerd Hoffmann Subject: Re: Migration of WinXP Guest -> usb+network failure Date: Mon, 14 Feb 2011 15:32:35 +0100 Message-ID: <4D593D03.3070707@redhat.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: qemu-devel , kvm@vger.kernel.org To: Peter Lieven Return-path: Received: from mx1.redhat.com ([209.132.183.28]:6375 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753636Ab1BNOcn (ORCPT ); Mon, 14 Feb 2011 09:32:43 -0500 In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: On 02/08/11 14:32, Peter Lieven wrote: > Hi, > > is there any known issue when migrating a WinXP SP3 guest with qemu-kvm 0.13.0 or qemu-kvm-0.12.5? > > If I migrate such a guest with a Realtek rtl8139 Network Device and an USB Mouse Tablet > after migration the USB Tablet doesn't work any more and network stalls. I have seen the mouse > moving a few seconds after migration and that stop moving. usb devices simply don't have migration support. The 0.14 release will add that for usb hid devices and the usb hub. Whenever the devices work after migration depends on how the guest os handles usb errors. Recent linux kernels just reset+reinitialize hid devices which fail, log a message about it and go on without a hitch. Other guests might be more sensitive, so this could be it, but maybe it isn't. No idea on the rtl issue. cheers, Gerd