From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:36640) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TCBjv-0008B5-EY for qemu-devel@nongnu.org; Thu, 13 Sep 2012 11:54:09 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TCBjl-0006rq-KU for qemu-devel@nongnu.org; Thu, 13 Sep 2012 11:54:03 -0400 Received: from mx1.redhat.com ([209.132.183.28]:56076) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TCBjl-0006rI-As for qemu-devel@nongnu.org; Thu, 13 Sep 2012 11:53:53 -0400 Message-ID: <50520189.3050707@redhat.com> Date: Thu, 13 Sep 2012 18:53:45 +0300 From: Avi Kivity MIME-Version: 1.0 References: <87pq5r5otp.fsf@codemonkey.ws> <20120912151549.GT20907@redhat.com> <87y5kfrtne.fsf@codemonkey.ws> <20120913104940.GA20907@redhat.com> <5051DC20.4090204@redhat.com> <20120913132804.GO7767@redhat.com> <87r4q6xbiy.fsf@codemonkey.ws> <20120913142228.GK20907@redhat.com> <5051EF0D.4070109@redhat.com> <5051F0CB.9040303@redhat.com> <5051FE85.6070904@redhat.com> <87har1orbl.fsf@codemonkey.ws> In-Reply-To: <87har1orbl.fsf@codemonkey.ws> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] Rethinking missed tick catchup List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Anthony Liguori Cc: Gleb Natapov , Jan Kiszka , Michael Roth , qemu-devel@nongnu.org, Paolo Bonzini , Luiz Capitulino , Eric Blake On 09/13/2012 06:50 PM, Anthony Liguori wrote: >>> >>>> This may not work for really old server oriented guests. >>> >>> S3 requires guest cooperation, period. But so does qemu-ga. It's >>> better than nothing, and we can't get perfection without guest cooperation. >> >> qemu-ga requires either an admin/tool to install qemu-ga, or for qemu-ga >> to be preinstalled by the OS vendor. S3 requires S3 support to be >> provided by the host vendor, and for it to be functional. A >> significantly easier bar to clear. > > We can easily generate an ISO that includes a pre-built version of > qemu-ga. We could easily generate water, but we can't make the horse drink it. > > Plus, there's a whole variety of other features enabled once we can > assume qemu-ga is available. It's worth solving that problem. We can't assume it. Too many OSes exist, too many guests are already exist and ain't broken, too many vendors are moving into a locked-down model. I agree it's great and we should take advantage of it, but we can't assume it's there. -- error compiling committee.c: too many arguments to function