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Re: [Xen-devel] clock drift in Xen 4.0.0

To: James Harper <james.harper@xxxxxxxxxxxxxxxx>, Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Subject: Re: [Xen-devel] clock drift in Xen 4.0.0
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Wed, 26 May 2010 10:48:55 +0100
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On 26/05/2010 10:33, "James Harper" <james.harper@xxxxxxxxxxxxxxxx> wrote:

>> What domU and dom0 kernel are you running?  pvops always has
> independent
>> wallclock.
> Dom0 is (pvops), domU is (not pvops). Which one
> matters here?

I think pv_ops doesn't play with dependent-wallclock either way round: It
won't resync its wallclock with Xen when running as domU; nor will it
periodically push its wallclock down to Xen when running as dom0. So if you
have pv_ops as the dom0 or the domU, you'd better run NTP in the domU.

 -- Keir

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