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Subject: Re: apm power_off on smp
From: Xavier Bestel <xavier.bestel@free.fr>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Pozsar Balazs <pozsy@uhulinux.hu>,
       Kelledin <kelledin+LKML@skarpsey.dyndns.org>,
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Le lun 15/07/2002 ? 02:57, Alan Cox a ?crit :
> > Would it be possible to use the CPU-hotplug patch to unplug all CPUs
> > except the one entering apm power-off ?
> 
> Only if your hardware supports true CPU unplugging and your BIOS
> supports APM for it. That is wildly improbable at best

Err .. my mobo's BIOS is SMP specific and implements APM, so I guess
there is a case where it's useful. It must be something like when
running Win95, which is UP only. Isn't Linux able to return to a UP-like
state (? la Win95) just before entering poweroff ?

Or perhaps my first assumption is false: the APM implementation in my
BIOS just wastes some flash and never intended to be utilized.

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