On Mon, 2015-06-01 at 15:38 -0400, Josef Bacik wrote: > Ok I got this patch to give me the same performance as all our other > crap, just need to apply this incremental > > > diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c > index b71eb2b..e11cfec 100644 > --- a/kernel/sched/fair.c > +++ b/kernel/sched/fair.c > @@ -4761,13 +4761,10 @@ select_task_rq_fair(struct task_struct *p, int > prev_cpu, int sd_flag, int wake_f > > if (tmp->flags & sd_flag) > sd = tmp; > - else if (!want_affine || (want_affine && affine_sd)) > - break; > }
That bit worries me a bit, because that causes us to have a weird definition for what sd is. Without WAKE_AFFINE, sd is the biggest domain with BALANCE_WAKE (or any other sd_flag) set. But with WAKE_AFFINE, its the first domain that satisfies the wake affine constraint of covering both the previous and waking cpu. It basically reduces sd to affine_sd. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
