Re: [lhcs-devel] Re: [PATCH][2.6-mm] i386 Hotplug CPU

[Pavel Machek <pavel@ucw.cz>]

Hi!

> > Yeah i recall you mentioning this earlier, i'll look into adding the
> > necessary bits so that you have enough state to resume from. Your
> > mentioning this was one of the reasons i wanted this in.
> 
> Pavel, considering that the processor is in a quiescent state when it's in
> the idle thread, can't we simply restart them all when we do the final
> sleep? So on the resume, we steer the APs straight into the offline cpu
> spin and manually bring them up again when the BSP has resumed? I
> reckon

Sorry, I do not understand what AP and BSP means in this context.

> we don't have to save any state at all. I probably don't have the full
> picture yet so feel free to set me straight.

Yes, we can just shut those cpus down on suspend and completely boot
them from real mode during resume... that should work. And we will
need to do that during suspend-to-ram.

								Pavel
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