[PATCH 2/3] sched: Fix asymmetric scheduling for POWER7

[Peter Zijlstra]

On Mon, Oct 21, 2013 at 05:14:52PM +0530, Vaidyanathan Srinivasan wrote:
>  kernel/sched/fair.c |    4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
> index 12f0eab..828ed97 100644
> --- a/kernel/sched/fair.c
> +++ b/kernel/sched/fair.c
> @@ -5821,8 +5821,8 @@ static inline int nohz_kick_needed(struct rq *rq, int cpu)
>  				goto need_kick_unlock;
>  		}
>  
> -		if (sd->flags & SD_ASYM_PACKING && nr_busy != sg->group_weight
> -		    && (cpumask_first_and(nohz.idle_cpus_mask,
> +		if (sd->flags & SD_ASYM_PACKING &&
> +			(cpumask_first_and(nohz.idle_cpus_mask,
>  					  sched_domain_span(sd)) < cpu))
>  			goto need_kick_unlock;
>  
> 

Ahh, so here you remove the nr_busy usage.. this patch should really go
before the first one that makes this all weird and funny.