From: Morten Rasmussen <morten.rasmus...@arm.com>
Fixes update_packing_domain() to behave better for topologies where
SD_SHARE_POWERLINE is disabled at highest sched domain level.
Signed-of-by: Morten Rasmussen <morten.rasmus...@arm.com>
---
kernel/sched/fair.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 0ee9834..d758086 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -184,7 +184,8 @@ void update_packing_domain(int cpu)
if (!sd)
sd = rcu_dereference_check_sched_domain(cpu_rq(cpu)->sd);
else
- sd = sd->parent;
+ if (cpumask_first(sched_domain_span(sd)) == cpu || !sd->parent)
+ sd = sd->parent;
while (sd) {
struct sched_group *sg = sd->groups;
@@ -195,6 +196,18 @@ void update_packing_domain(int cpu)
if (id == -1)
id = cpumask_first(sched_domain_span(sd));
+ /* Find sched group of candidate */
+ tmp = sd->groups;
+ do {
+ if (cpumask_test_cpu(id, sched_group_cpus(tmp))) {
+ sg = tmp;
+ break;
+ }
+ } while (tmp = tmp->next, tmp != sd->groups);
+
+ pack = sg;
+ tmp = sg->next;
+
/* loop the sched groups to find the best one */
while (tmp != sg) {
if (tmp->sgp->power * sg->group_weight <
--
1.7.9.5
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