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Commit 1e4b38eb authored by Vikram Mulukutla's avatar Vikram Mulukutla Committed by Gerrit - the friendly Code Review server
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sched: fair: Work in isolation conditions into SMP placement path 



This snapshot is taken from msm-4.9 as of commit a81181397b9229d
(Merge "msm: vidc: add P010 color format in govenors").

Change-Id: Ifc22b1295d4d89c219f3b2cb7a238ef31865301d
Signed-off-by: default avatarVikram Mulukutla <markivx@codeaurora.org>
Signed-off-by: default avatarSatya Durga Srinivasu Prabhala <satyap@codeaurora.org>
parent 12f679ce

kernel/sched/fair.c

+8 −2
Original line number Diff line number Diff line
@@ -6752,6 +6752,8 @@ static int select_idle_cpu(struct task_struct *p, struct sched_domain *sd, int t 
			return -1;

		if (!cpumask_test_cpu(cpu, &p->cpus_allowed))

			continue;

		if (cpu_isolated(cpu))

			continue;

		if (idle_cpu(cpu))

			break;

	}
@@ -6772,13 +6774,14 @@ static inline int __select_idle_sibling(struct task_struct *p, int prev, int tar 
	struct sched_domain *sd;

	int i;



	if (idle_cpu(target))

	if (idle_cpu(target) && !cpu_isolated(target))

		return target;



	/*

	 * If the previous cpu is cache affine and idle, don't be stupid.

	 */

	if (prev != target && cpus_share_cache(prev, target) && idle_cpu(prev))

	if (prev != target && cpus_share_cache(prev, target) &&

				idle_cpu(prev) && !cpu_isolated(i))

		return prev;



	sd = rcu_dereference(per_cpu(sd_llc, target));
@@ -6828,6 +6831,9 @@ static inline int select_idle_sibling_cstate_aware(struct task_struct *p, int pr 
				if (!idle_cpu(i))

					goto next;



				if (cpu_isolated(i))

					continue;



				/* figure out if the task can fit here at all */

				new_usage = boosted_task_util(p);

				capacity_orig = capacity_orig_of(i);