[PATCH 1/5] RT - fix for scheduling issue
- From: Gregory Haskins <ghaskins@xxxxxxxxxx>
- Date: Tue, 09 Oct 2007 10:25:49 -0400
From: Mike Kravetz <kravetz@xxxxxxxxxx>
RESCHED_IPIs can be missed if more than one RT task is awoken simultaneously
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
Signed-off-by: Gregory Haskins <ghaskins@xxxxxxxxxx>
---
kernel/sched.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/kernel/sched.c b/kernel/sched.c
index 93fd6de..3e75c62 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -2207,7 +2207,7 @@ static inline void finish_task_switch(struct rq *rq, struct task_struct *prev)
* If we pushed an RT task off the runqueue,
* then kick other CPUs, they might run it:
*/
- if (unlikely(rt_task(current) && prev->se.on_rq && rt_task(prev))) {
+ if (unlikely(rt_task(current) && rq->rt_nr_running > 1)) {
schedstat_inc(rq, rto_schedule);
smp_send_reschedule_allbutself_cpumask(current->cpus_allowed);
}
-
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- References:
- [PATCH 0/5] RT: scheduler fixes and rt_overload enhancements
- From: Gregory Haskins
- [PATCH 0/5] RT: scheduler fixes and rt_overload enhancements
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