diff mbox

[14/14] sched: force migration on buddy CPU

Message ID 1366910611-20048-15-git-send-email-vincent.guittot@linaro.org
State New
Headers show

Commit Message

Vincent Guittot April 25, 2013, 5:23 p.m. UTC 
If a CPU that doesn't participate to the packing effort, has at least one
running task, it means that its group is imbalanced and the CPUs can pull this
task.

Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
---
 kernel/sched/fair.c |    3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 54c1541..f87aed2 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -4729,6 +4729,9 @@  static inline void update_sg_lb_stats(struct lb_env *env,
 				max_nr_running = nr_running;
 			if (min_nr_running > nr_running)
 				min_nr_running = nr_running;
+
+			if (!is_my_buddy(i, i) && nr_running > 0)
+				sgs->group_imb = 1;
 		}
 
 		sgs->group_load += load;