From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50062) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WzYIB-0005mI-Bq for qemu-devel@nongnu.org; Tue, 24 Jun 2014 17:30:23 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WzYI1-0005w5-8H for qemu-devel@nongnu.org; Tue, 24 Jun 2014 17:30:15 -0400 Received: from theiggy.com ([66.220.1.110]:56216 helo=mail.theiggy.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WzYI1-0005ne-3d for qemu-devel@nongnu.org; Tue, 24 Jun 2014 17:30:05 -0400 Message-ID: <53A9EDAC.6040808@theiggy.com> Date: Tue, 24 Jun 2014 16:29:16 -0500 From: Brian Jackson MIME-Version: 1.0 References: In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] Live Migration with different block devices List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Xiongzi Ge , qemu-devel@nongnu.org On 6/24/2014 2:22 PM, Xiongzi Ge wrote: > Hi, > > > When I do live migration, in the source and destination host, there are > different block devices, but qemu can not detect this. I used virtio as the > driver in kvm and in the vdi device in the guest is /dev/vda. So, the vm > guest can read different data from the same /dev/vda device. I am studying > this code to let qemu understand that, this is a new device. > > Does qemu recognize different block devices after live migration? You aren't supposed to have different command line options when live migrating (with the exception of -incoming if you migrate that way). So whatever you are trying to do is unsupported. > Where is > the interface to modify this? Thanks > > > Gary >