Messages in this thread | | | From | "Luck, Tony" <> | Subject | RE: [PATCH 0/6] x86/cpu hotplug: Wake up offline CPU via mwait or nmi | Date | Tue, 5 Jun 2012 19:54:19 +0000 |
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> But given that you care about how fast a cpu can come up again, this > seems to be exactly what you want. You want to adapt to load fast, so > why bother going through userspace and wrecking bits in between?
There are multiple needs here - that appear to have some significant overlap (re-routing interrupts, stopping scheduling).
My need is for RAS reasons to take a cpu offline - and since it is broken, I'm not going to bring it back again (at least not anytime soon - perhaps a service engineer will drive by in a few hours, pull out the broken cpu, put in a new one, and then bring that online ... but saving a few milli-seconds in this use case it pointless).
Other people want to do this for power saving. They probably do care how fast the processor can be brought back.
-Tony
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