Commit 55b39b0c authored by Yury Norov (NVIDIA)'s avatar Yury Norov (NVIDIA) Committed by Peter Zijlstra
Browse files

sched/fair: Use cpumask_weight_and() in sched_balance_find_dst_group() 



In the group_has_spare case, the function creates a temporary cpumask
to just calculate weight of (p->cpus_ptr & sched_group_span(local)).

We've got a dedicated helper for it.

Signed-off-by: default avatarYury Norov (NVIDIA) <yury.norov@gmail.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: default avatarVincent Guittot <vincent.guittot@linaro.org>
Reviewed-by: default avatarK Prateek Nayak <kprateek.nayak@amd.com>
Reviewed-by: default avatarFernand Sieber <sieberf@amazon.com>
Link: https://patch.msgid.link/20251207034247.402926-1-yury.norov@gmail.com
parent 0ab25ea2

kernel/sched/fair.c

+3 −4
Original line number Diff line number Diff line
@@ -10974,10 +10974,9 @@ sched_balance_find_dst_group(struct sched_domain *sd, struct task_struct *p, int 
			 * take care of it.

			 */

			if (p->nr_cpus_allowed != NR_CPUS) {

				struct cpumask *cpus = this_cpu_cpumask_var_ptr(select_rq_mask);



				cpumask_and(cpus, sched_group_span(local), p->cpus_ptr);

				imb_numa_nr = min(cpumask_weight(cpus), sd->imb_numa_nr);

				unsigned int w = cpumask_weight_and(p->cpus_ptr,

								sched_group_span(local));

				imb_numa_nr = min(w, sd->imb_numa_nr);

			}



			imbalance = abs(local_sgs.idle_cpus - idlest_sgs.idle_cpus);