Re: CPU hotplug broken in 2.6.8-rc2 ?

[Zwane Mwaikambo]

On Tue, 3 Aug 2004, Nathan Lynch wrote:

>                 __setscheduler(rq->idle, SCHED_NORMAL, 0);
>                 task_rq_unlock(rq, &flags);
>                 BUG_ON(rq->nr_running != 0);
>
> I can reproduce this on both ppc64 and i386.  Does anyone know why this
> is happening?
>
> If I remove the BUG_ON, things seem to go ok, but I doubt that's the
> right thing to do.

It could have something to do with the staircase scheduler, Con, got any
wise words?

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