From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39730) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cImQi-0002ZZ-2q for qemu-devel@nongnu.org; Sun, 18 Dec 2016 20:07:53 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cImQe-0002p6-TT for qemu-devel@nongnu.org; Sun, 18 Dec 2016 20:07:52 -0500 Received: from mx1.redhat.com ([209.132.183.28]:35878) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cImQe-0002oi-O2 for qemu-devel@nongnu.org; Sun, 18 Dec 2016 20:07:48 -0500 Date: Mon, 19 Dec 2016 09:07:43 +0800 From: Fam Zheng Message-ID: <20161219010743.GA2719@lemon> References: <53e52412-cd32-cb9e-2261-882a7b5b84ea@imatronix.cl> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <53e52412-cd32-cb9e-2261-882a7b5b84ea@imatronix.cl> Subject: Re: [Qemu-devel] Can qemu reopen image files? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Christopher Pereira Cc: qemu-devel@nongnu.org On Sun, 12/18 20:52, Christopher Pereira wrote: > Hi, > > We are doing a "qemu-img convert" operation (qcow2, with compression) to > shorten the backing-chain (in the middle of the backing-chain). > In order to force qemu to reopen files, we do a save and restore operation. > Is there a faster way to reopen image files using virsh or qemu? No, don't use qemu-img when the image is in use by QEMU. You want to use "block-commit" command provided by QMP. Fam