sched: terminate newidle balancing once at least one task has moved over

Inspired by Peter Zijlstra.

Signed-off-by: Gregory Haskins <ghaskins@novell.com>
Cc: npiggin@suse.de
Cc: rostedt@goodmis.org
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/kernel/sched.c b/kernel/sched.c
index 677c80b..d99aeab 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3013,6 +3013,10 @@ static int move_tasks(struct rq *this_rq, int this_cpu, struct rq *busiest,
                                max_load_move - total_load_moved,
                                sd, idle, all_pinned, &this_best_prio);
                class = class->next;
+
+               if (idle == CPU_NEWLY_IDLE && this_rq->nr_running)
+                       break;
+
        } while (class && max_load_move > total_load_moved);
 
        return total_load_moved > 0;