Messages in this thread | | | Subject | RE: [PATCH 0/6] x86/cpu hotplug: Wake up offline CPU via mwait or nmi | From | Peter Zijlstra <> | Date | Tue, 05 Jun 2012 21:56:15 +0200 |
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On Tue, 2012-06-05 at 19:54 +0000, Luck, Tony wrote:
> 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).
Right, performance is completely irrelevant in this case. In fact, the current code should work perfectly fine for you -- except for the whole BSP nightmare x86 has.
> Other people want to do this for power saving. They probably do care > how fast the processor can be brought back.
They're bloody insane, or working with broken hardware.
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