From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43)
	id 1LCZCu-0000lg-Re
	for qemu-devel@nongnu.org; Tue, 16 Dec 2008 07:39:24 -0500
Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43)
	id 1LCZCu-0000lJ-3r
	for qemu-devel@nongnu.org; Tue, 16 Dec 2008 07:39:24 -0500
Received: from [199.232.76.173] (port=57108 helo=monty-python.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.43) id 1LCZCt-0000lG-V2
	for qemu-devel@nongnu.org; Tue, 16 Dec 2008 07:39:23 -0500
Received: from mx2.redhat.com ([66.187.237.31]:45200)
	by monty-python.gnu.org with esmtp (Exim 4.60)
	(envelope-from <gleb@redhat.com>) id 1LCZCs-0002Gp-W9
	for qemu-devel@nongnu.org; Tue, 16 Dec 2008 07:39:23 -0500
Date: Tue, 16 Dec 2008 14:38:12 +0200
From: Gleb Natapov <gleb@redhat.com>
Subject: Re: [Qemu-devel] [PATCH] Time drift again.
Message-ID: <20081216123812.GF13794@redhat.com>
References: <20081216122511.GE13794@redhat.com>
	<200812161233.31503.paul@codesourcery.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <200812161233.31503.paul@codesourcery.com>
Reply-To: qemu-devel@nongnu.org
List-Id: qemu-devel.nongnu.org
List-Unsubscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/pipermail/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: Paul Brook <paul@codesourcery.com>
Cc: qemu-devel@nongnu.org

On Tue, Dec 16, 2008 at 12:33:30PM +0000, Paul Brook wrote:
> On Tuesday 16 December 2008, Gleb Natapov wrote:
> > Hello,
> >
> >  After my last patch to fix interrupt coalescing was rejected
> > on the basis that it is too intrusive we decided to make the
> > fix much more localized and only fix the problem for RTC time
> > source. Unfortunately it is impossible to fix the problem entirely
> > inside RTC code like Andrzej proposed since Windows reads RTC
> > register C more then once on each time interrupt so it is impossible
> > to count reliably how many interrupt windows actually handled.
> > Proposed solution is localized to I386 target and is disabled by
> > default. To enable it "-rtc-td-hack" flag should be used.
> 
> You need documentation for the new option.
> 
Will add to the next patch.

--
			Gleb.