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yaml --- r: 145705 b: refs/heads/master c: e790fb0 h: refs/heads/master i: 145703: adc6ccc v: v3
git-mirror · Apr 14, 2009 · 2bc0b27 · 2bc0b27
1 parent 9e56977
commit 2bc0b27
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Showing 2 changed files with 18 additions and 2 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f711f6090a81cbd396b63de90f415d33f563af9b
+refs/heads/master: e790fb0ba64bfec158e1219d899cb588275d12ab
diff --git a/trunk/kernel/sched.c b/trunk/kernel/sched.c
@@ -4414,8 +4414,24 @@ int select_nohz_load_balancer(int stop_tick)
 			/* make me the ilb owner */
 			if (atomic_cmpxchg(&nohz.load_balancer, -1, cpu) == -1)
 				return 1;
-		} else if (atomic_read(&nohz.load_balancer) == cpu)
+		} else if (atomic_read(&nohz.load_balancer) == cpu) {
+			int new_ilb;
+
+			if (!(sched_smt_power_savings ||
+						sched_mc_power_savings))
+				return 1;
+			/*
+			 * Check to see if there is a more power-efficient
+			 * ilb.
+			 */
+			new_ilb = find_new_ilb(cpu);
+			if (new_ilb < nr_cpu_ids && new_ilb != cpu) {
+				atomic_set(&nohz.load_balancer, -1);
+				resched_cpu(new_ilb);
+				return 0;
+			}
 			return 1;
+		}
 	} else {
 		if (!cpumask_test_cpu(cpu, nohz.cpu_mask))
 			return 0;