Index: linux-2.6.19-rc4-mm2/include/linux/vmstat.h
===================================================================
--- linux-2.6.19-rc4-mm2.orig/include/linux/vmstat.h	2006-11-02 14:19:35.000000000 -0600
+++ linux-2.6.19-rc4-mm2/include/linux/vmstat.h	2006-11-07 22:13:27.200831591 -0600
@@ -47,6 +47,8 @@ enum vm_event_item { PGPGIN, PGPGOUT, PS
 		FOR_ALL_ZONES(PGSCAN_DIRECT),
 		PGINODESTEAL, SLABS_SCANNED, KSWAPD_STEAL, KSWAPD_INODESTEAL,
 		PAGEOUTRUN, ALLOCSTALL, PGROTATED,
+		SCHED_TICK_NO_BALANCE, SCHED_TICK_BALANCE, SCHED_BALANCE_TASKLET,
+		SCHED_LOAD_BALANCE, SCHED_TICK_BALANCE_RUNNING,
 		NR_VM_EVENT_ITEMS
 };
 
Index: linux-2.6.19-rc4-mm2/kernel/sched.c
===================================================================
--- linux-2.6.19-rc4-mm2.orig/kernel/sched.c	2006-11-07 21:57:23.000000000 -0600
+++ linux-2.6.19-rc4-mm2/kernel/sched.c	2006-11-08 00:43:25.380231861 -0600
@@ -2880,6 +2880,8 @@ static void rebalance_domains(unsigned l
 	/* Earliest time when we have to call rebalance_domains again */
 	unsigned long next_balance = jiffies + 60*HZ;
 
+	__count_vm_event(SCHED_BALANCE_TASKLET);
+
 	for_each_domain(this_cpu, sd) {
 		if (!(sd->flags & SD_LOAD_BALANCE))
 			continue;
@@ -2894,6 +2896,7 @@ static void rebalance_domains(unsigned l
 			interval = 1;
 
 		if (time_after_eq(jiffies, sd->last_balance + interval)) {
+			__count_vm_event(SCHED_LOAD_BALANCE);
 			if (load_balance(this_cpu, this_rq, sd, idle)) {
 				/*
 				 * We've pulled tasks over so either we're no
@@ -3170,8 +3173,15 @@ void scheduler_tick(void)
 		task_running_tick(rq, p);
 #ifdef CONFIG_SMP
 	update_load(rq);
-	if (time_after_eq(jiffies, rq->next_balance))
+	if (time_after_eq(jiffies, rq->next_balance)) {
+		if (test_bit(TASKLET_STATE_SCHED, &rebalance.state))
+			__count_vm_event(SCHED_TICK_BALANCE_RUNNING);
+		else
+			__count_vm_event(SCHED_TICK_BALANCE);
+
 		tasklet_schedule(&rebalance);
+	} else
+		__count_vm_event(SCHED_TICK_NO_BALANCE);
 #endif
 }
 
Index: linux-2.6.19-rc4-mm2/mm/vmstat.c
===================================================================
--- linux-2.6.19-rc4-mm2.orig/mm/vmstat.c	2006-11-07 16:24:39.000000000 -0600
+++ linux-2.6.19-rc4-mm2/mm/vmstat.c	2006-11-07 22:13:42.453097142 -0600
@@ -509,6 +509,11 @@ static char *vmstat_text[] = {
 	"allocstall",
 
 	"pgrotated",
+	"sched_tick_no_balance",
+	"sched_tick_balance",
+	"sched_balance_tasklet",
+	"sched_load_balance",
+	"sched_tick_balance_running",
 #endif
 };