1 files changed, 19 insertions, 0 deletions

diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index 95f36f61ae1d..ac7d06786454 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -151,8 +151,27 @@ yield_task_rt(struct rq *rq)
 }
 
 #ifdef CONFIG_SMP
+static int find_lowest_rq(struct task_struct *task);
+
 static int select_task_rq_rt(struct task_struct *p, int sync)
 {
+        struct rq *rq = task_rq(p);
+
+        /*
+         * If the task will not preempt the RQ, try to find a better RQ
+         * before we even activate the task
+         */
+        if ((p->prio >= rq->rt.highest_prio)
+            && (p->nr_cpus_allowed > 1)) {
+                int cpu = find_lowest_rq(p);
+
+                return (cpu == -1) ? task_cpu(p) : cpu;
+        }
+
+        /*
+         * Otherwise, just let it ride on the affined RQ and the
+         * post-schedule router will push the preempted task away
+         */
         return task_cpu(p);
 }
 #endif /* CONFIG_SMP */