From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([208.118.235.92]:35759)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <avi@redhat.com>) id 1TCBhb-0004sC-AM
	for qemu-devel@nongnu.org; Thu, 13 Sep 2012 11:51:43 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <avi@redhat.com>) id 1TCBha-0006DO-8Q
	for qemu-devel@nongnu.org; Thu, 13 Sep 2012 11:51:39 -0400
Received: from mx1.redhat.com ([209.132.183.28]:44411)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <avi@redhat.com>) id 1TCBhZ-0006DH-Vf
	for qemu-devel@nongnu.org; Thu, 13 Sep 2012 11:51:38 -0400
Message-ID: <50520102.6080401@redhat.com>
Date: Thu, 13 Sep 2012 18:51:30 +0300
From: Avi Kivity <avi@redhat.com>
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>
	<87boha7zyx.fsf@codemonkey.ws> <20120913144811.GL20907@redhat.com>
In-Reply-To: <20120913144811.GL20907@redhat.com>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Subject: Re: [Qemu-devel] Rethinking missed tick catchup
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: Gleb Natapov <gleb@redhat.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>, Michael Roth <mdroth@linux.vnet.ibm.com>, qemu-devel@nongnu.org, Anthony Liguori <anthony@codemonkey.ws>, Paolo Bonzini <pbonzini@redhat.com>, Luiz Capitulino <lcapitulino@redhat.com>, Eric Blake <eblake@redhat.com>

On 09/13/2012 05:48 PM, Gleb Natapov wrote:
> On Thu, Sep 13, 2012 at 09:35:18AM -0500, Anthony Liguori wrote:
>> Gleb Natapov <gleb@redhat.com> writes:
>> 
>> > On Thu, Sep 13, 2012 at 09:06:29AM -0500, Anthony Liguori wrote:
>> >> "Daniel P. Berrange" <berrange@redhat.com> writes:
>> >> 
>> >> I think it's better for QEMU to talk to qemu-ga.  We can tell when a large
>> >> period of time has passed in QEMU because we'll accumulate a large
>> >> number of missed ticks.
>> >> 
>> > With RTC configured to use vm clock we will not.
>> 
>> Not for host suspend.  For stop and live migration, we stop vm_clock.
>> But QEMU isn't aware of host suspend so vm_clock cannot be stopped.
>> 
> Hmm, true. What about hooking into suspend and doing vmstop during
> suspend. 

There is a DBus API (UPower) with a method called AboutToSleep().  No
idea what it does or if unprivileged processes can access it.  libvirt
of qemud could do it, of course.

-- 
error compiling committee.c: too many arguments to function