Index: linux-2.6.19-rc3/kernel/sched.c
===================================================================
--- linux-2.6.19-rc3.orig/kernel/sched.c	2006-10-28 20:00:07.000000000 -0500
+++ linux-2.6.19-rc3/kernel/sched.c	2006-10-28 20:04:08.721364884 -0500
@@ -2869,10 +2869,10 @@ static void rebalance_domains(unsigned l
 	unsigned long interval;
 	struct sched_domain *sd;
 	/*
-	 * A task is idle if this is the idle queue
-	 * and we have no runnable task
+	 * We are idle if there are no processes running. This
+	 * is valid even if we are the idle process (SMT).
 	 */
-	enum idle_type idle = (this_rq->idle && !this_rq->nr_running) ?
+	enum idle_type idle = !this_rq->nr_running ?
 				SCHED_IDLE : NOT_IDLE;
 	/* Earliest time when we have to call rebalance_domains again */
 	unsigned long next_balance = jiffies + 60*HZ;