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Commit 8c033469 authored by Lauro Ramos Venancio's avatar Lauro Ramos Venancio Committed by Ingo Molnar
Browse files

sched/topology: Refactor function build_overlap_sched_groups() 



Create functions build_group_from_child_sched_domain() and
init_overlap_sched_group(). No functional change.

Signed-off-by: default avatarLauro Ramos Venancio <lvenanci@redhat.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: default avatarRik van Riel <riel@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1492091769-19879-2-git-send-email-lvenanci@redhat.com


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 7708d5f0

kernel/sched/topology.c

+43 −19
Original line number Diff line number Diff line
@@ -513,6 +513,47 @@ int group_balance_cpu(struct sched_group *sg) 
	return cpumask_first_and(sched_group_cpus(sg), sched_group_mask(sg));

}



static struct sched_group *

build_group_from_child_sched_domain(struct sched_domain *sd, int cpu)

{

	struct sched_group *sg;

	struct cpumask *sg_span;



	sg = kzalloc_node(sizeof(struct sched_group) + cpumask_size(),

			GFP_KERNEL, cpu_to_node(cpu));



	if (!sg)

		return NULL;



	sg_span = sched_group_cpus(sg);

	if (sd->child)

		cpumask_copy(sg_span, sched_domain_span(sd->child));

	else

		cpumask_copy(sg_span, sched_domain_span(sd));



	return sg;

}



static void init_overlap_sched_group(struct sched_domain *sd,

				     struct sched_group *sg, int cpu)

{

	struct sd_data *sdd = sd->private;

	struct cpumask *sg_span;



	sg->sgc = *per_cpu_ptr(sdd->sgc, cpu);

	if (atomic_inc_return(&sg->sgc->ref) == 1)

		build_group_mask(sd, sg);



	/*

	 * Initialize sgc->capacity such that even if we mess up the

	 * domains and no possible iteration will get us here, we won't

	 * die on a /0 trap.

	 */

	sg_span = sched_group_cpus(sg);

	sg->sgc->capacity = SCHED_CAPACITY_SCALE * cpumask_weight(sg_span);

	sg->sgc->min_capacity = SCHED_CAPACITY_SCALE;

}



static int

build_overlap_sched_groups(struct sched_domain *sd, int cpu)

{
@@ -537,31 +578,14 @@ build_overlap_sched_groups(struct sched_domain *sd, int cpu) 
		if (!cpumask_test_cpu(i, sched_domain_span(sibling)))

			continue;



		sg = kzalloc_node(sizeof(struct sched_group) + cpumask_size(),

				GFP_KERNEL, cpu_to_node(cpu));



		sg = build_group_from_child_sched_domain(sibling, cpu);

		if (!sg)

			goto fail;



		sg_span = sched_group_cpus(sg);

		if (sibling->child)

			cpumask_copy(sg_span, sched_domain_span(sibling->child));

		else

			cpumask_set_cpu(i, sg_span);



		cpumask_or(covered, covered, sg_span);



		sg->sgc = *per_cpu_ptr(sdd->sgc, i);

		if (atomic_inc_return(&sg->sgc->ref) == 1)

			build_group_mask(sd, sg);



		/*

		 * Initialize sgc->capacity such that even if we mess up the

		 * domains and no possible iteration will get us here, we won't

		 * die on a /0 trap.

		 */

		sg->sgc->capacity = SCHED_CAPACITY_SCALE * cpumask_weight(sg_span);

		sg->sgc->min_capacity = SCHED_CAPACITY_SCALE;

		init_overlap_sched_group(sd, sg, i);



		/*

		 * Make sure the first group of this domain contains the