Re: [RFC] ACPI power-off on P4 HT

[Zwane Mwaikambo]

On Wed, 25 Feb 2004, Len Brown wrote:

> Willy,
> I do think we need a generic way to be sure that certain routines are
> run only on cpu0.

set_cpus_allowed?

> I don't see it in the ACPI spec, but it seems that on some platforms,
> some register accesses (such as writing to the sleep control reg) are
> reliable only when accessed from cpu0.
>
> This issue has been with us for some time:
> http://bugzilla.kernel.org/show_bug.cgi?id=1141
>
> I am hopeful that the prepare-shutdown sequence you suggest below will
> not be necessary.
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