From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:58895) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WrUWI-0003VA-JF for qemu-devel@nongnu.org; Mon, 02 Jun 2014 11:51:39 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WrUW9-0003Us-CZ for qemu-devel@nongnu.org; Mon, 02 Jun 2014 11:51:30 -0400 Received: from mail-we0-x232.google.com ([2a00:1450:400c:c03::232]:36881) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WrUW9-0003UU-73 for qemu-devel@nongnu.org; Mon, 02 Jun 2014 11:51:21 -0400 Received: by mail-we0-f178.google.com with SMTP id u56so5405076wes.9 for ; Mon, 02 Jun 2014 08:51:20 -0700 (PDT) Sender: Paolo Bonzini Message-ID: <538C9D74.3020204@redhat.com> Date: Mon, 02 Jun 2014 17:51:16 +0200 From: Paolo Bonzini MIME-Version: 1.0 References: <1401276034-30486-1-git-send-email-dgilbert@redhat.com> <5385CC10.6030909@redhat.com> <20140528120444.GE2372@work-vm> <871tv7bhyn.fsf@blackfin.pond.sub.org> <20140602135004.GF2634@work-vm> In-Reply-To: <20140602135004.GF2634@work-vm> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 0/3] Migrate with destination version List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Dr. David Alan Gilbert" , Markus Armbruster Cc: lcapitulino@redhat.com, Laszlo Ersek , qemu-devel@nongnu.org, quintela@redhat.com Il 02/06/2014 15:50, Dr. David Alan Gilbert ha scritto: > However, it gets trickier since the destination libvirt has to know to send > the version information to the source; so we can only use this trick between > versions where the libvirt on both ends knows about it; so if we suddenly hit > a compatibility issue where we need it then we'd have to update libvirt on both > sides, which is too late. > > So putting this in now, and getting it into libvirt means everyone has the info. It also means we have a higher risk of getting it wrong, and having to do the work twice. Paolo