From a1adf2b1f42095723f35368c874afd29fdbe19bf Mon Sep 17 00:00:00 2001
From: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
Date: Tue, 8 May 2007 00:33:01 -0700
Subject: [PATCH] --- yaml --- r: 54759 b: refs/heads/master c:
 4953198b6ce07b008b0f1c2edd41c9d027a118b4 h: refs/heads/master i:   54757:
 c04ac4cb2bfaf0fb45485fb3b1c6e3fe1269308d   54755:
 053cfa9fdcf6018306b9383406882d5a3fb51fdc   54751:
 9f8bc2e09714cbb963afe7f355eaf59395eca08c v: v3

---
 [refs]               |  2 +-
 trunk/kernel/sched.c | 11 ++++++++++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/[refs] b/[refs]
index e45a7b20c7c8..f132c6d9385a 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 5517d86bea237c1d7078840182d9ebc0fe4c1afc
+refs/heads/master: 4953198b6ce07b008b0f1c2edd41c9d027a118b4
diff --git a/trunk/kernel/sched.c b/trunk/kernel/sched.c
index e4a5888549a5..e60786eb731c 100644
--- a/trunk/kernel/sched.c
+++ b/trunk/kernel/sched.c
@@ -1406,7 +1406,16 @@ static int wake_idle(int cpu, struct task_struct *p)
 	struct sched_domain *sd;
 	int i;
 
-	if (idle_cpu(cpu))
+	/*
+	 * If it is idle, then it is the best cpu to run this task.
+	 *
+	 * This cpu is also the best, if it has more than one task already.
+	 * Siblings must be also busy(in most cases) as they didn't already
+	 * pickup the extra load from this cpu and hence we need not check
+	 * sibling runqueue info. This will avoid the checks and cache miss
+	 * penalities associated with that.
+	 */
+	if (idle_cpu(cpu) || cpu_rq(cpu)->nr_running > 1)
 		return cpu;
 
 	for_each_domain(cpu, sd) {