Init this_load to max value instead of 0 in find_idlest_group.
If the local group is skipped because it doesn't have allowed CPUs, this_load
stays to 0, no idlest group will be returned and the selected CPU will be a
not allowed one (which will be replaced in select_fallback_rq by a random
one). With a default value set to max, we will use the idlest group even if we
skip the local_group.
Signed-off-by: Vincent Guittot <vincent.guit...@linaro.org>
---
kernel/sched/fair.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index f9b03c1..2d9f782 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -3532,7 +3532,7 @@ find_idlest_group(struct sched_domain *sd, struct
task_struct *p,
int this_cpu, int sd_flag)
{
struct sched_group *idlest = NULL, *group = sd->groups;
- unsigned long min_load = ULONG_MAX, this_load = 0;
+ unsigned long min_load = ULONG_MAX, this_load = ULONG_MAX;
int load_idx = sd->forkexec_idx;
int imbalance = 100 + (sd->imbalance_pct-100)/2;
--
1.7.9.5
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