[PATCH] Turn on NUMA rebalancing

From: "Martin J. Bligh" <mbligh@aracnet.com>

I'd forgotten that I'd set this to only fire every 20s in the past, because
it would rebalance too agressively.  That seems to be fixed now, so we should
turn it back on.

kernel/sched.c

@@ -1091,7 +1091,7 @@ static void load_balance(runqueue_t *this_rq, int idle, unsigned long cpumask)
 #define IDLE_REBALANCE_TICK (HZ/1000 ?: 1)
 #define BUSY_REBALANCE_TICK (HZ/5 ?: 1)
 #define IDLE_NODE_REBALANCE_TICK (IDLE_REBALANCE_TICK * 5)
-#define BUSY_NODE_REBALANCE_TICK (BUSY_REBALANCE_TICK * 100)
+#define BUSY_NODE_REBALANCE_TICK (BUSY_REBALANCE_TICK * 2)
 
 #ifdef CONFIG_NUMA
 static void balance_node(runqueue_t *this_rq, int idle, int this_cpu)