---

yaml --- r: 125380 b: refs/heads/master c: 7eb52df h: refs/heads/master v: v3
git-mirror · Dec 19, 2008 · 9d83640 · 9d83640
1 parent b4d88b3
commit 9d83640
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Showing 2 changed files with 19 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7a09b1a27b1e5a4957e4af9951420fea02c44fba
+refs/heads/master: 7eb52dfa70dbf5232b5b83ec4357e6bebaa8fde8
diff --git a/trunk/kernel/sched_fair.c b/trunk/kernel/sched_fair.c
@@ -1026,6 +1026,24 @@ static int wake_idle(int cpu, struct task_struct *p)
 {
 	struct sched_domain *sd;
 	int i;
+	unsigned int chosen_wakeup_cpu;
+	int this_cpu;
+
+	/*
+	 * At POWERSAVINGS_BALANCE_WAKEUP level, if both this_cpu and prev_cpu
+	 * are idle and this is not a kernel thread and this task's affinity
+	 * allows it to be moved to preferred cpu, then just move!
+	 */
+
+	this_cpu = smp_processor_id();
+	chosen_wakeup_cpu =
+		cpu_rq(this_cpu)->rd->sched_mc_preferred_wakeup_cpu;
+
+	if (sched_mc_power_savings >= POWERSAVINGS_BALANCE_WAKEUP &&
+		idle_cpu(cpu) && idle_cpu(this_cpu) &&
+		p->mm && !(p->flags & PF_KTHREAD) &&
+		cpu_isset(chosen_wakeup_cpu, p->cpus_allowed))
+		return chosen_wakeup_cpu;
 
 	/*
 	 * If it is idle, then it is the best cpu to run this task.