From owner-freebsd-bugs@FreeBSD.ORG  Mon Jan 23 20:40:14 2012
Return-Path: <owner-freebsd-bugs@FreeBSD.ORG>
Delivered-To: freebsd-bugs@hub.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id E0BB6106566B
	for <freebsd-bugs@hub.freebsd.org>;
	Mon, 23 Jan 2012 20:40:14 +0000 (UTC)
	(envelope-from gnats@FreeBSD.org)
Received: from freefall.freebsd.org (freefall.freebsd.org
	[IPv6:2001:4f8:fff6::28])
	by mx1.freebsd.org (Postfix) with ESMTP id 1613A8FC19
	for <freebsd-bugs@hub.freebsd.org>;
	Mon, 23 Jan 2012 20:40:14 +0000 (UTC)
Received: from freefall.freebsd.org (localhost [127.0.0.1])
	by freefall.freebsd.org (8.14.5/8.14.5) with ESMTP id q0NKeDCR017602
	for <freebsd-bugs@freefall.freebsd.org>; Mon, 23 Jan 2012 20:40:13 GMT
	(envelope-from gnats@freefall.freebsd.org)
Received: (from gnats@localhost)
	by freefall.freebsd.org (8.14.5/8.14.5/Submit) id q0NKeDFi017597;
	Mon, 23 Jan 2012 20:40:13 GMT (envelope-from gnats)
Date: Mon, 23 Jan 2012 20:40:13 GMT
Message-Id: <201201232040.q0NKeDFi017597@freefall.freebsd.org>
To: freebsd-bugs@FreeBSD.org
From: Bruce Cran <bruce@cran.org.uk>
Cc: 
Subject: Re: misc/164419: 9.0-RELEASE clock stops in Xen 3.2.1
X-BeenThere: freebsd-bugs@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
Reply-To: Bruce Cran <bruce@cran.org.uk>
List-Id: Bug reports <freebsd-bugs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-bugs>,
	<mailto:freebsd-bugs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-bugs>
List-Post: <mailto:freebsd-bugs@freebsd.org>
List-Help: <mailto:freebsd-bugs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-bugs>,
	<mailto:freebsd-bugs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 23 Jan 2012 20:40:15 -0000

The following reply was made to PR misc/164419; it has been noted by GNATS.

From: Bruce Cran <bruce@cran.org.uk>
To: Robert Lampe <rlampe@tqhosting.com>
Cc: freebsd-gnats-submit@FreeBSD.org
Subject: Re: misc/164419: 9.0-RELEASE clock stops in Xen 3.2.1
Date: Mon, 23 Jan 2012 20:31:13 +0000

 On 23/01/2012 20:14, Robert Lampe wrote:
 > After following the freebsd-update instructions 
 > (http://www.freebsd.org/releases/9.0R/installation.html) to upgrade to 
 > 9.0-RELEASE, we have found that VMs running in HVM mode in Xen 3.2.1 
 > have an issue where the clock stops working after about 3 minutes: # 
 > date Mon Jan 23 20:06:21 UTC 2012 # date Mon Jan 23 20:09:48 UTC 2012 
 > Any other call of date after this outputs the same result. New 
 > processes cannot be started and the machine is essentially frozen.
 
 The timecounter code was overhauled for 9.0, making progress towards a 
 'tickless' kernel. As a quick workaround you should be able to set 
 kern.eventtimer.periodic=1 to get ticks going again. You might want to 
 add it to /etc/sysctl.conf to make it permanent until a proper fix can 
 be made.
 
 -- 
 Bruce Cran