Re: [2.6.17-rc5-mm2] crash when doing second suspend: BUG in arch/i386/kernel/nmi.c:174

[Nigel Cunningham]

Hi.

On Wednesday 07 June 2006 09:55, Don Zickus wrote:
> > > So my question is/was what is the proper way to handle processor level
> > > subsystems during the suspend/resume path on an SMP system.  I really
> > > don't understand the hotplug path nor the suspend/resume path very
> > > well.
> >
> > Make it work properly for CPU hotplug for individual CPU and then in
> > suspend you take care of "global" state and the last CPU.
>
> So the assumption is treat all the cpus the same either all on or all off,
> no mixed mode (some cpus on, some cpus off).  I guess I was trying to hard
> to work on the per-cpu level.

This sounds wrong to me. Shouldn't the the effect of hotunplugging a cpu be to 
put the driver in a state equivalent to if that cpu simply didn't exist? 
Unplugging shouldn't assume we're going to subsequently have either a driver 
suspend, or a replug.

Regards,

Nigel
-- 
Nigel, Michelle and Alisdair Cunningham
5 Mitchell Street
Cobden 3266
Victoria, Australia

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