Re: Firing on all CPUs
On Mon, May 14, 2001 at 04:22:09PM -0700, Brandon High wrote:
> On Mon, May 14, 2001 at 01:27:03PM -0700, Osamu Aoki wrote:
> > For SMP, donot forget to put not just apm=on but also apm=power-off in
> > lilo.conf/append thing.
>
> I understand how this would help in general, but how does this apply to an
> SMP system differently than an Uni-processor system?
A UP system only needs apm=on, SMP also needs apm=power-off in order to shut
itself off. I'm not entirely sure of the reason, but SMP systems are a bit
touchier about that sort of thing. My best guess is that it has to do with
making sure that you don't have one CPU still writing cached data to disk
while another one cuts the power, but that's only a guess.
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