The following commit has been merged into the sched/core branch of tip: Commit-ID: 6025643596895695956c27119c6b0bfa40d8035b Gitweb: https://git.kernel.org/tip/6025643596895695956c27119c6b0bfa40d8035b Author: Ricardo Neri <ricardo.neri-calderon@xxxxxxxxxxxxxxx> AuthorDate: Fri, 10 Sep 2021 18:18:16 -07:00 Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx> CommitterDate: Tue, 05 Oct 2021 15:52:02 +02:00 sched/fair: Optimize checking for group_asym_packing sched_asmy_prefer() always returns false when called on the local group. By checking local_group, we can avoid additional checks and invoking sched_asmy_prefer() when it is not needed. No functional changes are introduced. Signed-off-by: Ricardo Neri <ricardo.neri-calderon@xxxxxxxxxxxxxxx> Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Reviewed-by: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx> Reviewed-by: Len Brown <len.brown@xxxxxxxxx> Reviewed-by: Vincent Guittot <vincent.guittot@xxxxxxxxxx> Link: https://lkml.kernel.org/r/20210911011819.12184-4-ricardo.neri-calderon@xxxxxxxxxxxxxxx --- kernel/sched/fair.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 71b30ef..e050b1d 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -8631,7 +8631,7 @@ static inline void update_sg_lb_stats(struct lb_env *env, } /* Check if dst CPU is idle and preferred to this group */ - if (env->sd->flags & SD_ASYM_PACKING && + if (!local_group && env->sd->flags & SD_ASYM_PACKING && env->idle != CPU_NOT_IDLE && sgs->sum_h_nr_running && sched_asym_prefer(env->dst_cpu, group->asym_prefer_cpu)) {
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