misc/164419: 9.0-RELEASE clock stops in Xen 3.2.1
Rob Lampe
rlampe at tqhosting.com
Mon Jan 23 21:30:12 UTC 2012
The following reply was made to PR misc/164419; it has been noted by GNATS.
From: Rob Lampe <rlampe at tqhosting.com>
To: Bruce Cran <bruce at cran.org.uk>
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 15:55:40 -0500
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Thanks for the info. It seems to be running well now.
On Mon, Jan 23, 2012 at 3:31 PM, Bruce Cran <bruce at cran.org.uk> wrote:
> On 23/01/2012 20:14, Robert Lampe wrote:
>
>> After following the freebsd-update instructions (http://www.freebsd.org/*
>> *releases/9.0R/installation.**html<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
>
--
Rob Lampe
Tranquil Hosting / RootBSD
www.tqhosting.com
www.rootbsd.net
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<div>Thanks for the info. It seems to be running well now.</div><br><div cl=
ass=3D"gmail_quote">On Mon, Jan 23, 2012 at 3:31 PM, Bruce Cran <span dir=
=3D"ltr"><<a href=3D"mailto:bruce at cran.org.uk" target=3D"_blank">bruce at c=
ran.org.uk</a>></span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
On 23/01/2012 20:14, Robert Lampe wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
After following the freebsd-update instructions (<a href=3D"http://www.free=
bsd.org/releases/9.0R/installation.html" target=3D"_blank">http://www.freeb=
sd.org/<u></u>releases/9.0R/installation.<u></u>html</a>) to upgrade to 9.0=
-RELEASE, we have found that VMs running in HVM mode in Xen 3.2.1 have an i=
ssue 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 da=
te after this outputs the same result. New processes cannot be started and =
the machine is essentially frozen.<br>
</blockquote>
<br>
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=3D1 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.<s=
pan><font color=3D"#888888"><br>
<br>
-- <br>
Bruce Cran<br>
</font></span></blockquote></div><br><br clear=3D"all"><div><br></div>-- <b=
r>Rob Lampe<div>Tranquil Hosting / RootBSD</div><div><a href=3D"http://www.=
tqhosting.com" target=3D"_blank">www.tqhosting.com</a><br></div><div><a hre=
f=3D"http://www.rootbsd.net" target=3D"_blank">www.rootbsd.net</a><br>
</div><br>
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