sched: wake-balance fixes

We have logic to detect whether the system has migratable tasks, but we are
not using it when deciding whether to push tasks away.  So we add support
for considering this new information.

Signed-off-by: Gregory Haskins <ghaskins@novell.com>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/kernel/sched.c b/kernel/sched.c
index 3344ba7..c591abd 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -346,6 +346,7 @@ struct rt_rq {
        unsigned long rt_nr_migratory;
        /* highest queued rt task prio */
        int highest_prio;
+       int overloaded;
 };
 
 /*
@@ -6770,6 +6771,7 @@ void __init sched_init(void)
                rq->migration_thread = NULL;
                INIT_LIST_HEAD(&rq->migration_queue);
                rq->rt.highest_prio = MAX_RT_PRIO;
+               rq->rt.overloaded = 0;
 #endif
                atomic_set(&rq->nr_iowait, 0);
 

diff --cc kernel/sched_rt.c
Simple merge