If a task lowers its priority (say by losing priority inheritance)
if a higher priority task is waiting on another CPU, initiate a pull.
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
Index: linux-rt.git/kernel/sched/rt.c
===================================================================
--- linux-rt.git.orig/kernel/sched/rt.c
+++ linux-rt.git/kernel/sched/rt.c
@@ -997,6 +997,8 @@ inc_rt_prio(struct rt_rq *rt_rq, int pri
inc_rt_prio_smp(rt_rq, prio, prev_prio);
}
+static int pull_rt_task(struct rq *this_rq);
+
static void
dec_rt_prio(struct rt_rq *rt_rq, int prio)
{
@@ -1021,6 +1023,10 @@ dec_rt_prio(struct rt_rq *rt_rq, int pri
rt_rq->highest_prio.curr = MAX_RT_PRIO;
dec_rt_prio_smp(rt_rq, prio, prev_prio);
+
+ /* Try to pull RT tasks here if we lower this rq's prio */
+ if (prev_prio < rt_rq->highest_prio.curr)
+ pull_rt_task(rq_of_rt_rq(rt_rq));
}
#else
--
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