Index: linux-2.6.15-rc3/mm/page_alloc.c
===================================================================
--- linux-2.6.15-rc3.orig/mm/page_alloc.c	2005-11-28 19:51:27.000000000 -0800
+++ linux-2.6.15-rc3/mm/page_alloc.c	2005-12-01 00:38:05.000000000 -0800
@@ -557,6 +557,33 @@ static int rmqueue_bulk(struct zone *zon
 }
 
 #ifdef CONFIG_NUMA
+static spinlock_t node_stat_lock;
+unsigned long vm_stat_global[NR_STAT_ITEMS];
+unsigned long vm_stat_node[MAX_NUMNODES][NR_STAT_ITEMS];
+int vm_stat_diff[NR_CPUS][MAX_NUMNODES][NR_STAT_ITEMS];
+
+void refresh_vm_stats(void) {
+	int cpu;
+	int node;
+	int i;
+
+	spin_lock(&node_stat_lock);
+
+	cpu = get_cpu();
+	for_each_online_node(node)
+		for(i = 0; i < NR_STAT_ITEMS; i++) {
+			int * p = vm_stat_diff[cpu][node]+i;
+			if (*p) {
+				vm_stat_node[node][i] += *p;
+				vm_stat_global[i] += *p;
+				*p = 0;
+			}
+		}
+	put_cpu();
+
+	spin_unlock(&node_stat_lock);
+}
+
 /* Called from the slab reaper to drain remote pagesets */
 void drain_remote_pages(void)
 {
Index: linux-2.6.15-rc3/include/linux/page-flags.h
===================================================================
--- linux-2.6.15-rc3.orig/include/linux/page-flags.h	2005-11-28 19:51:27.000000000 -0800
+++ linux-2.6.15-rc3/include/linux/page-flags.h	2005-12-01 00:35:38.000000000 -0800
@@ -163,6 +163,27 @@ extern void __mod_page_state(unsigned lo
 	} while (0)
 
 /*
+ * Node based accounting with per cpu differentials.
+ */
+enum node_stat_item { };
+#define NR_STAT_ITEMS 0
+
+extern unsigned long vm_stat_global[NR_STAT_ITEMS];
+extern unsigned long vm_stat_node[MAX_NUMNODES][NR_STAT_ITEMS];
+extern int vm_stat_diff[NR_CPUS][MAX_NUMNODES][NR_STAT_ITEMS];
+
+static inline void mod_node_page_state(int node, enum node_stat_item item, int delta)
+{
+	vm_stat_diff[get_cpu()][node][item] += delta;
+	put_cpu();
+}
+
+#define inc_node_page_state(node, item) mod_node_page_state(node, item, 1)
+#define dec_node_page_state(node, item) mod_node_page_state(node, item, -1)
+#define add_node_page_state(node, item) mod_node_page_state(node, item, delta)
+#define sub_node_page_state(node, item) mod_node_page_state(node, item, -(delta))
+
+/*
  * Manipulation of page state flags
  */
 #define PageLocked(page)		\
Index: linux-2.6.15-rc3/include/linux/gfp.h
===================================================================
--- linux-2.6.15-rc3.orig/include/linux/gfp.h	2005-11-28 19:51:27.000000000 -0800
+++ linux-2.6.15-rc3/include/linux/gfp.h	2005-12-01 00:34:02.000000000 -0800
@@ -153,8 +153,10 @@ extern void FASTCALL(free_cold_page(stru
 void page_alloc_init(void);
 #ifdef CONFIG_NUMA
 void drain_remote_pages(void);
+void refresh_vm_stats(void);
 #else
 static inline void drain_remote_pages(void) { };
+static inline void refresh_vm_stats(void) { }
 #endif
 
 #endif /* __LINUX_GFP_H */
Index: linux-2.6.15-rc3/mm/slab.c
===================================================================
--- linux-2.6.15-rc3.orig/mm/slab.c	2005-11-28 19:51:27.000000000 -0800
+++ linux-2.6.15-rc3/mm/slab.c	2005-12-01 00:34:02.000000000 -0800
@@ -3359,6 +3359,7 @@ next:
 	check_irq_on();
 	up(&cache_chain_sem);
 	drain_remote_pages();
+	refresh_vm_stats();
 	/* Setup the next iteration */
 	schedule_delayed_work(&__get_cpu_var(reap_work), REAPTIMEOUT_CPUC);
 }