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Commit 36d4ec70 authored by Satya Durga Srinivasu Prabhala's avatar Satya Durga Srinivasu Prabhala
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sched: Do not support colocation on cluster with one CPU 



Add check to make sure we do not colocate tasks to cluster
which has only one CPU. If tasks in a group should migrate,
tasks shouldn't migrate to cluster with only one CPU as CPU
won't be able to handle all the tasks in the group.

Change-Id: I01fdc9cf625eeaa01e2c4f137edb21e8610d41c1
Signed-off-by: default avatarSatya Durga Srinivasu Prabhala <satyap@codeaurora.org>
parent 456c150f

kernel/sched/walt.c

+7 −2
Original line number Diff line number Diff line
@@ -2420,13 +2420,18 @@ static struct sched_cluster *best_cluster(struct related_thread_group *grp, 
					u64 total_demand, bool group_boost)

{

	struct sched_cluster *cluster = NULL;

	struct sched_cluster *last_best_cluster = sched_cluster[0];



	for_each_sched_cluster(cluster) {

		if (cpumask_weight(&cluster->cpus) <= 1)

			continue;



		last_best_cluster = cluster;

		if (group_will_fit(cluster, grp, total_demand, group_boost))

			return cluster;

			break;

	}



	return sched_cluster[0];

	return last_best_cluster;

}



int preferred_cluster(struct sched_cluster *cluster, struct task_struct *p)