On Fri, 18 Dec 1998, Rik van Riel wrote:
> The real fix for this one is to try rescheduling the previous
> processor of the task in question instead of blindly trying
> current.
>
> All it takes is one pointer per processor, so it can be done
> (very) cheaply.
it's _not_ that cheap since it means a cross-CPU message pass. I'd suggest
that unless you can demonstrate serious problems with the current code,
leave this until 2.3. I have some code that does the mentioned SMP thing
more apropriately (scheduling done completely at add_to_runqueue() time),
and it's already in there partly (see reschedule_idle()), but it's
original form was too intrusive for 2.2.
-- mingo
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