From 998e08f4c327d3687326e31983133dbd57affce9 Mon Sep 17 00:00:00 2001
From: Gregory Haskins <ghaskins@novell.com>
Date: Fri, 25 Jan 2008 21:08:10 +0100
Subject: [PATCH] --- yaml --- r: 76135 b: refs/heads/master c:
 318e0893ce3f524ca045f9fd9dfd567c0a6f9446 h: refs/heads/master i:   76133:
 5e467c3f3ee0e06cc60e2e3a796f50dab1951bd3   76131:
 ab3c308c14d14d5936ba7ad9606664bc68dc65c7   76127:
 5c3c2722eb0e690d0fad95313037b5d3dc318f35 v: v3

---
 [refs]                  |  2 +-
 trunk/kernel/sched_rt.c | 19 +++++++++++++++++++
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index ef48b4e3e5db..2c2669030d35 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 2de0b4639f4b1b6bfe31f795e5855f041f177170
+refs/heads/master: 318e0893ce3f524ca045f9fd9dfd567c0a6f9446
diff --git a/trunk/kernel/sched_rt.c b/trunk/kernel/sched_rt.c
index 95f36f61ae1d..ac7d06786454 100644
--- a/trunk/kernel/sched_rt.c
+++ b/trunk/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 */