Add Mike Galbraith.
Any one like to give some comments?
On 01/15/2014 10:23 PM, Alex Shi wrote:
> If the sd domain just has one group, then we must be caught the
> i == target later, and then goes to deeper level domain.
> So just skip this domain checking to save some instructions.
>
> Signed-off-by: Alex Shi <alex....@linaro.org>
> ---
> kernel/sched/fair.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
> index c7395d9..3265fbc 100644
> --- a/kernel/sched/fair.c
> +++ b/kernel/sched/fair.c
> @@ -4196,6 +4196,11 @@ static int select_idle_sibling(struct task_struct *p,
> int target)
> sd = rcu_dereference(per_cpu(sd_llc, target));
> for_each_lower_domain(sd) {
> sg = sd->groups;
> +
> + /* skip single group domain */
> + if (sg == sg->next)
> + continue;
> +
> do {
> if (!cpumask_intersects(sched_group_cpus(sg),
> tsk_cpus_allowed(p)))
>
--
Thanks
Alex
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