Re: [Xen-devel] Time Change Issue Xen 4.1

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Mon, Nov 14, 2011 at 11:31:51AM -0800, Jeremy Fitzhardinge wrote:
> On 11/14/2011 10:00 AM, Konrad Rzeszutek Wilk wrote:
> > Right. With those patches too (he used the xen-settime patch set which has 
> > it).
> > The hypercall is done (and the do_settime gets called) and the results are 
> > saved
> > in the RTC. And the wc_sec and wc_nsec are updated and propagated.
> >
> > The problem is that wc_sec and wc_nsec are only propagated to the
> > existing guests.
> >
> > If you launch a new guest after the 'hwclock', the new guests
> > retains the old wallclock time.
> 
> Existing (pvops) guests shouldn't see updated wallclock time, because
> they never look at the hypervisor's wallclock after boot time.
> 
> It's surprising that new guests don't see the updated wallclock though. 
> That sounds like a Xen issue.

<nods> That is what I think is happening here.

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