Re: [PATCH][2.5] Don't wake up tasks on offline processors

From: Ingo Molnar (mingo@elte.hu)
Date: Mon Feb 17 2003 - 09:52:45 EST

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On Mon, 17 Feb 2003, Zwane Mwaikambo wrote:

> Ok i'll have a go at that instead, however how hard would it be to do a
> multiple lock acquisition of that magnitude on 16+ cpus?

just do a simple loop of spin_lock()'s over all online CPUs, in forward
order, ordering between runqueue locks is ordered by CPU number.

Ingo

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