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SubjectRe: [PATCH] 2.4.18 scheduler bugs
Date
>> - reschedule_idle() - smp_send_reschedule when setting idle's need_resched
>>
>> Idle tasks nowdays don't spin waiting for need->resched to change,
>> they sleep on a halt insn instead. Therefore any setting of
>> need->resched on an idle task running on a remote CPU should be
>> accompanied by a cross-processor interrupt.
>
> this is broken as well. Check out the idle=poll feature i wrote some time
> ago.

The idle=poll stuff is a hack. I'd like my idle cpus to sleep and still
have them wake up the moment work for them becomes available. I see no
reason why an idle cpu should be forced to remain idle until the next
tick, nor why fixing that should be considered `broken'.

Joe

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