From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:39285) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SsIti-0005mZ-EB for qemu-devel@nongnu.org; Fri, 20 Jul 2012 15:31:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1SsIro-0001QG-KX for qemu-devel@nongnu.org; Fri, 20 Jul 2012 15:29:58 -0400 Received: from mail-wg0-f53.google.com ([74.125.82.53]:39267) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SsITZ-0001JN-15 for qemu-devel@nongnu.org; Fri, 20 Jul 2012 15:02:57 -0400 Received: by wgbfm10 with SMTP id fm10so3295370wgb.10 for ; Fri, 20 Jul 2012 12:02:56 -0700 (PDT) Sender: Paolo Bonzini Message-ID: <5009AB5B.4030608@redhat.com> Date: Fri, 20 Jul 2012 21:02:51 +0200 From: Paolo Bonzini MIME-Version: 1.0 References: <1342781633-7288-1-git-send-email-pbonzini@redhat.com> <1342781633-7288-8-git-send-email-pbonzini@redhat.com> <20120720173836.GD2941@illuin> In-Reply-To: <20120720173836.GD2941@illuin> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 7/7] RTC: Allow to migrate from old QEMU List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Michael Roth Cc: "Zhang, Yang Z" , qemu-devel@nongnu.org, Juan Quintela Il 20/07/2012 19:38, Michael Roth ha scritto: >> > The new logic is compatible with old, and it should not block migration >> > from old QEMU. However, the new version cannot migrate to the old one. > Do we not plan to support 1.2 -> 1.1 with -M pc-1.1? No, we don't. That's why in general subsections are preferred to version bumps, as long as the subsection is sent rarely (to fix bugs) or only for features that are never enabled in the old version. Actually I think all of our subsections are of the former kind. Paolo