Date: Mon, 23 Jan 2012 20:40:13 GMT From: Bruce Cran <bruce@cran.org.uk> To: freebsd-bugs@FreeBSD.org Subject: Re: misc/164419: 9.0-RELEASE clock stops in Xen 3.2.1 Message-ID: <201201232040.q0NKeDFi017597@freefall.freebsd.org>
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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
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