sched: Warn on rt throttling

PATCH Thomas Gleixner 1 participant 1 message Oct 5, 2011

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Thomas Gleixner

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2011-10-05 11:32 UTC #0 lore raw

The default rt-throttling is a source of never ending questions. Warn once when we go into throttling so folks have that info in dmesg.

Signed-off-by Thomas Gleixner <[email protected]>

---
 kernel/sched_rt.c |    1 +
 1 file changed, 1 insertion(+)

kernel/sched_rt.c +1 -0

Index: linux-2.6/kernel/sched_rt.c
===================================================================
@@ -631,6 +631,7 @@ static int sched_rt_runtime_exceeded(str
 
 	if (rt_rq->rt_time > runtime) {
 		rt_rq->rt_throttled = 1;
+		printk_once(KERN_WARNING "sched: RT throttling activated\n");
 		if (rt_rq_throttled(rt_rq)) {
 			sched_rt_rq_dequeue(rt_rq);
 			return 1;