misc/164419: 9.0-RELEASE clock stops in Xen 3.2.1

Bruce Cran bruce at cran.org.uk
Mon Jan 23 20:40:15 UTC 2012

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

From: Bruce Cran <bruce at cran.org.uk>
To: Robert Lampe <rlampe at tqhosting.com>
Cc: freebsd-gnats-submit at 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

More information about the freebsd-bugs mailing list