RE: [Xen-devel] [PATCH] per-cpu time changes

["Puthiyaparambil, Aravindh" <aravindh.puthiyaparambil@xxxxxxxxxx>]

Keir,

I would be interested in the interim patch.

Thanks,
Aravindh

> -----Original Message-----
> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel-
> bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Keir Fraser
> Sent: Saturday, July 09, 2005 5:40 AM
> To: Don Fry
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-devel] [PATCH] per-cpu time changes
> 
> 
> On 8 Jul 2005, at 23:47, Don Fry wrote:
> 
> > Here is another set of patches for the per-cpu timer changes to xen
and
> > linux.  The patch is against today's xen-unstable-src.tgz.  This
fixes
> > the occasional panic I was seeing on booting a slower system, and
the
> > constant panic booting a fast system.  It has been tested UP and SMP
on
> > an IBM summit system, and an IntelliStation.  The 'time went
backwards'
> > messages are no longer seen.
> 
> Great! I'm cooking up a time patch to check in over the next few days
> -- it should handle the one remaining problem I see with your patch,
> that although 'guest time' will be monotonic on each individual cpu,
> they will diverge over time because percpu_ticks does not update local
> time w.r.t. a shared timebase. I think solving that necessarily means
> some bigger changes to how time is handled in Xen, and the interface
to
> guests, and I'm currently merging those changes into the xenlinux tree
> (the Xen side is done and I can post an interim patch if that's
> interesting for anyone).
> 
>   -- Keir
> 
> 
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