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From
SubjectRe: CPU Management for Linux?
Date
Followup to:  <Pine.BSF.4.03.9903221741010.1375-100000@funky.monkey.org>
By author: Chuck Lever <cel@monkey.org>
In newsgroup: linux.dev.kernel
>
> i would think there would be need to unconditionally and safely vary a CPU
> offline, for example during a machine check. how hard could it be to
> transparently transfer running processes to other CPUs?
>

Trivial. Your typical SMP kernel does this several times a second.
It is only if you allow the user to lock it down to a CPU that it matters.

-hpa

--
"The user's computer downloads the ActiveX code and simulates a 'Blue
Screen' crash, a generally benign event most users are familiar with
and that would not necessarily arouse suspicions."
-- Security exploit description on http://www.zks.net/p3/how.aspb

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