Re: [ACPI] Re: [RFC 0/6] S3 SMP support with physcial CPU hotplug

Nigel Cunningham
2005-04-04T11:44:45Z

Hi again.

On Mon, 2005-04-04 at 21:31, Pavel Machek wrote:
> Hi!
>
> > > > The patches are against 2.6.11-rc1 with Zwane's CPU hotplug patch in -mm
> > > > tree.
> > >
> > > Should I merge that thing into mainline? It seems that a few people are
> > > needing it.
> >
> > Perhaps we should address the MTRR issue first.
> >
> > I've had code in Suspend2 for quite a while (6 months+) that removes the
> > sysdev support for MTRRs and saves and restores them with CPU context,
> > thereby avoiding the smp_call-while-interrupts-disabled issue. Perhaps
> > it would be helpful here?
>
> This seems like separate issue... I'd prefer not to block this patch.
>
> MTRRs should be probably handled by some kind of "cpu is going down"
> and "cpu is going up" callbacks... Zwane, do you have any ideas?
> Linklist of handlers should be enough...

What else is it needed for? CpuFreq?

Nigel
--
Nigel Cunningham
Software Engineer, Canberra, Australia
http://www.cyclades.com
Bus: +61 (2) 6291 9554; Hme: +61 (2) 6292 8028; Mob: +61 (417) 100 574

Maintainer of Suspend2 Kernel Patches http://suspend2.net