On 10/10, Peter Zijlstra wrote:
>
> On Thu, Oct 09, 2014 at 09:32:32PM +0200, Oleg Nesterov wrote:
> > @@ -2802,15 +2802,8 @@ need_resched:
> >             rq->curr = next;
> >             ++*switch_count;
> >
> > -           context_switch(rq, prev, next); /* unlocks the rq */
> > -           /*
> > -            * The context switch have flipped the stack from under us
> > -            * and restored the local variables which were saved when
> > -            * this task called schedule() in the past. prev == current
> > -            * is still correct, but it can be moved to another cpu/rq.
> > -            */
> > -           cpu = smp_processor_id();
> > -           rq = cpu_rq(cpu);
> > +           rq = context_switch(rq, prev, next); /* unlocks the rq */
> > +           cpu = rq->cpu;
>
> This won't compile on UP, cpu_of(rq) works though.

Heh ;) and I swear I was going to write cpu_of().

and I agree with BUG_ON() in __trace_sched_switch() if CONFIG_SCHED_DEBUG.

I am travelling till next Wednesday, will resend everything once I return.

Thanks a lot!

Oleg.

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