Re: [Xen-devel] [PATCH 2/3] xen: add correct 500 ms offset when setting Xen wallclock

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Mon, 2012-10-15 at 13:21 +0100, David Vrabel wrote:
> On 15/10/12 10:25, Ian Campbell wrote:
> > On Fri, 2012-10-12 at 13:57 +0100, David Vrabel wrote:
> >> From: David Vrabel <david.vrabel@xxxxxxxxxx>
> >>
> >> update_persistent_wallclock() (and hence xet_set_wallclock()) is
> >> called 500 ms after the second.
> > 
> > The comment in sync_cmos_clock says it is called 500ms before the next
> > second.
> 
> This is the same thing, right?

It matters in the native case, where, If I'm reading it right, things
are setup such thatthe time change happens on the next second tick over.
I just wanted to check it did/didn't matter here as well.

> 
> > I only mention it to double check that the right semantics for
> > set_wallclock are being implemented, i.e. that we are compensating in
> > the right direction.
> 
> I'll add some debug code to make sure.
> 
> David



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