From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51747) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WzYQr-00034l-KF for qemu-devel@nongnu.org; Tue, 24 Jun 2014 17:39:20 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WzYQk-0000FJ-Td for qemu-devel@nongnu.org; Tue, 24 Jun 2014 17:39:13 -0400 Received: from smtp.codeaurora.org ([198.145.11.231]:34882) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WzYQk-0000F7-NN for qemu-devel@nongnu.org; Tue, 24 Jun 2014 17:39:06 -0400 Message-ID: <53A9EFF7.6020703@codeaurora.org> Date: Tue, 24 Jun 2014 17:39:03 -0400 From: Christopher Covington MIME-Version: 1.0 References: <53A9D388.8080307@redhat.com> <53A9E266.8080506@redhat.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8 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 Cc: Paolo Bonzini , qemu-devel@nongnu.org On 06/24/2014 05:26 PM, Xiongzi Ge wrote: > Hi , > > This is just related to migration, but it may be not in the standard > migration. The cache device in different hosts can only be accessed by the vm > running in the host. The problem for me is to find the interface of the cache > in the guest or like first doing it in the qemu, after migration, this cache > should recognize that the cache content storing in the disk has been > changed. DOes anyone has good suggestions? Thanks ! I don't know much about storage and don't really understand what you're describing (what is a cache device?), but I've been using Checkpoint and Restore in Userspace (CRIU) [1] to move Linux processes between systems with different (simulated) hardware. The kernels end up with non-identical state, but that's fine for my purposes. http://www.criu.org/Main_Page Christopher -- Employee of Qualcomm Innovation Center, Inc. Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by the Linux Foundation.