Messages in this thread | | | Subject | Re: [PATCH 01/14] Introduce cpu_enabled_map and friends | From | Andi Kleen <> | Date | Tue, 15 Jul 2008 12:03:27 +0200 |
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Matthew Wilcox <matthew@wil.cx> writes: > > I don't understand why we want to know about these CPUs. Surely they > should be 'possible', but not 'present'? What useful thing can Linux do > with them?
He explained it in the intro, near the end (I nearly complained about this too when I hadn't finished reading it completely :):
|The big picture implication is that we can allow userspace |to interact with disabled CPUs. In this particular example, |we provide a knob that lets a sysadmin schedule any present |CPU for firmware deconfiguration or enablement.
The reason sounds pretty exotic, but ok.
-Andi
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