Re: 2.7 thoughts

[Mark Mielke]

On Fri, Oct 10, 2003 at 07:47:23AM -0700, William Lee Irwin III wrote:
> On Fri, Oct 10, 2003 at 04:35:29PM +0200, G?bor L?n?rt wrote:
> > Why? Sure, you should note OS before unplug a CPU ;-) but in this case OS
> > should be noticed that it could not use that CPU any more (like scheduler,
> > interrupt delivering etc). And then it's not an issue if you unplug THAT
> > cpu. Sure, some hw supporting is needed, a "normal" motherboard does not
> > like to unplug a CPU when powered of course by hardware issues, but "CPU
> > hotplug capable" motherboards can support this. Maybe of course some notice
> > mechanism is needed for the motherboard as well not only for the OS, but it
> > only mean that notfication before unplugging the CPU should be delivered to
> > the OS _and_ to the hardware. Sure, I have no experience at all in this

Perhaps I've naive here, but - with hot-pluggable CPU machines, do you not
de-activate the CPU through software first, before pulling the CPU out, at
which point it is not in use?

mark

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