From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:54843) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1T6Jui-0000VM-4z for qemu-devel@nongnu.org; Tue, 28 Aug 2012 07:25:00 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1T6Juh-00040b-5G for qemu-devel@nongnu.org; Tue, 28 Aug 2012 07:24:56 -0400 From: Juan Quintela In-Reply-To: <503BA2D2.8020602@suse.de> ("Andreas =?utf-8?Q?F=C3=A4rber=22?= =?utf-8?Q?'s?= message of "Mon, 27 Aug 2012 18:39:46 +0200") References: <000001cd844e$7747c480$65d74d80$@Dovgaluk@ispras.ru> <503BA2D2.8020602@suse.de> Date: Tue, 28 Aug 2012 13:23:38 +0200 Message-ID: <87ehmrgszp.fsf@elfo.mitica> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Subject: Re: [Qemu-devel] [PATCH] Save/load PC speaker internal state Reply-To: quintela@redhat.com List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Andreas =?utf-8?Q?F=C3=A4rber?= Cc: Peter Maydell , 'qemu-devel' , Pavel Dovgaluk , qemu-stable@nongnu.org Andreas F=C3=A4rber wrote: > Am 27.08.2012 14:21, schrieb Pavel Dovgaluk: >> Save PC speaker state to remove differences between system >> states after saving the snapshot and after loading it again. >> This patch is needed for deterministic replay of the execution. >>=20 > > What about pc-1.0 etc. machines? Does this need to be backported to > stable branches first for migration from v1.2 to work? Or is such > incoming excess data silently ignored? Or any compat magic required on to= p? Is there a way to detect if we have ever used the speaker? Otherwise, it is difficult to know if we should sent it or not. Later, Juan.