From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:40099) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S0VFS-0008E9-I3 for qemu-devel@nongnu.org; Thu, 23 Feb 2012 04:46:08 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1S0VFL-0006s2-7Q for qemu-devel@nongnu.org; Thu, 23 Feb 2012 04:46:02 -0500 Received: from mx1.redhat.com ([209.132.183.28]:33156) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S0VFK-0006ry-VF for qemu-devel@nongnu.org; Thu, 23 Feb 2012 04:45:55 -0500 Received: from int-mx12.intmail.prod.int.phx2.redhat.com (int-mx12.intmail.prod.int.phx2.redhat.com [10.5.11.25]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q1N9jsAA011186 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Thu, 23 Feb 2012 04:45:54 -0500 Message-ID: <4F460ACF.4000206@redhat.com> Date: Thu, 23 Feb 2012 10:45:51 +0100 From: Paolo Bonzini MIME-Version: 1.0 References: <7a726783-0035-4c1c-a91c-d0469754c32c@zmail16.collab.prod.int.phx2.redhat.com> In-Reply-To: <7a726783-0035-4c1c-a91c-d0469754c32c@zmail16.collab.prod.int.phx2.redhat.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 2/3] Update the blkmirror block driver List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Federico Simoncelli Cc: kwolf@redhat.com, mtosatti@redhat.com, qemu-devel@nongnu.org On 02/23/2012 10:44 AM, Federico Simoncelli wrote: > Any comment on the BDRV_O_NO_BACKING flag I added? That's the real > trick I'm pulling here. It basically allows to open the second image > only for writing and it doesn't complain if the backing file is not > there yet (it will be copied during step 4). Yes, it makes sense to me. Paolo