From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53240) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Z5GOU-0000RM-Mj for qemu-devel@nongnu.org; Wed, 17 Jun 2015 12:40:55 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Z5GOP-0000q9-Df for qemu-devel@nongnu.org; Wed, 17 Jun 2015 12:40:54 -0400 Received: from mx1.redhat.com ([209.132.183.28]:49724) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Z5GOP-0000pA-8V for qemu-devel@nongnu.org; Wed, 17 Jun 2015 12:40:49 -0400 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) by mx1.redhat.com (Postfix) with ESMTPS id BFB7F36B4F2 for ; Wed, 17 Jun 2015 16:40:48 +0000 (UTC) Message-ID: <5581A30C.5060800@redhat.com> Date: Wed, 17 Jun 2015 18:40:44 +0200 From: Paolo Bonzini MIME-Version: 1.0 References: <20150617094829-mutt-send-email-mst@redhat.com> <55812BC4.3000600@redhat.com> <20150617121148-mutt-send-email-mst@redhat.com> <55815B06.5030508@redhat.com> <20150617114053.GG2122@work-vm> <55815D8C.3080904@redhat.com> <20150617120746.GH2122@work-vm> <5581661A.1060101@redhat.com> <20150617163731-mutt-send-email-mst@redhat.com> <87381q47kg.fsf@neno.neno> <20150617183752-mutt-send-email-mst@redhat.com> In-Reply-To: <20150617183752-mutt-send-email-mst@redhat.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH] Migration compatibility for serial List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Michael S. Tsirkin" , Juan Quintela Cc: amit.shah@redhat.com, "Dr. David Alan Gilbert" , qemu-devel@nongnu.org On 17/06/2015 18:39, Michael S. Tsirkin wrote: > > Same machine type. Second is able to receive it. First one is not. > > Source don't know what is on the other side. If user is going to put a: > > > > --dont_send_serial_because_I_don't_care > > > > Then it can as well just disable the serial device and live with it. > > Just losing worst-case a couple of characters is not the same as > losing serial functionality. This is _not_ losing serial functionality. Usually the FIFOs are not migrated. This is losing serial functionality _that wasn't being used anyway_. > We could have a flag to tell us what's on the other side, > but that would need even more testing. So let's keep it > simple. Yes, let's keep it simple. Let's keep it the same as 2.3 has been released. Paolo