Re: SD_SHARE_CPUPOWER breaks scheduler fairness

[Con Kolivas <kernel@kolivas.org>]

On Thu, 2 Jun 2005 04:41, Steve Rotolo wrote:
> I guess the bottom-line is: given N logical cpus, 1/N of all
> SCHED_NORMAL tasks may get stuck on a sibling cpu with no chance to
> run.  All it takes is one spinning SCHED_FIFO task.  Sounds like a bug.

You're right, and excuse me for missing it. We have to let SCHED_NORMAL tasks 
run for some period with rt tasks. There shouldn't be any combination of 
mutually exclusive tasks for siblings.

I'll work on something.

Cheers,
Con

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