---

yaml
---
r: 83086
b: refs/heads/master
c: a7f75e2
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 08e7d9b557299ba6ce57165ce8df310780bd681c
+refs/heads/master: a7f75e25860ac0a7b70cf6e14c37618d2d2bb890

trunk/mm/vmstat.c

@@ -284,6 +284,10 @@ EXPORT_SYMBOL(dec_zone_page_state);
 /*
  * Update the zone counters for one cpu.
  *
+ * The cpu specified must be either the current cpu or a processor that
+ * is not online. If it is the current cpu then the execution thread must
+ * be pinned to the current cpu.
+ *
  * Note that refresh_cpu_vm_stats strives to only access
  * node local memory. The per cpu pagesets on remote zones are placed
  * in the memory local to the processor using that pageset. So the
@@ -299,7 +303,7 @@ void refresh_cpu_vm_stats(int cpu)
 {
 	struct zone *zone;
 	int i;
-	unsigned long flags;
+	int global_diff[NR_VM_ZONE_STAT_ITEMS] = { 0, };
 
 	for_each_zone(zone) {
 		struct per_cpu_pageset *p;
@@ -311,15 +315,19 @@ void refresh_cpu_vm_stats(int cpu)
 
 		for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)
 			if (p->vm_stat_diff[i]) {
+				unsigned long flags;
+				int v;
+
 				local_irq_save(flags);
-				zone_page_state_add(p->vm_stat_diff[i],
-					zone, i);
+				v = p->vm_stat_diff[i];
 				p->vm_stat_diff[i] = 0;
+				local_irq_restore(flags);
+				atomic_long_add(v, &zone->vm_stat[i]);
+				global_diff[i] += v;
 #ifdef CONFIG_NUMA
 				/* 3 seconds idle till flush */
 				p->expire = 3;
 #endif
-				local_irq_restore(flags);
 			}
 #ifdef CONFIG_NUMA
 		/*
@@ -351,6 +359,10 @@ void refresh_cpu_vm_stats(int cpu)
 			drain_zone_pages(zone, p->pcp + 1);
 #endif
 	}
+
+	for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)
+		if (global_diff[i])
+			atomic_long_add(global_diff[i], &vm_stat[i]);
 }
 
 #endif