X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=mm%2Fvmstat.c;h=422d960ffcd892ae63087b9179354832c14c1f20;hb=e169c139642fb4c682ec12a409725508dbefa520;hp=e8d846f57774ee631adc5836aeaa6498b39736a0;hpb=86533e80e0a20ed1a676f9eeb2dde0fa5ff23276;p=linux-2.6-omap-h63xx.git

diff --git a/mm/vmstat.c b/mm/vmstat.c
index e8d846f5777..422d960ffcd 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -21,21 +21,14 @@ EXPORT_PER_CPU_SYMBOL(vm_event_states);
 
 static void sum_vm_events(unsigned long *ret, cpumask_t *cpumask)
 {
-	int cpu = 0;
+	int cpu;
 	int i;
 
 	memset(ret, 0, NR_VM_EVENT_ITEMS * sizeof(unsigned long));
 
-	cpu = first_cpu(*cpumask);
-	while (cpu < NR_CPUS) {
+	for_each_cpu_mask(cpu, *cpumask) {
 		struct vm_event_state *this = &per_cpu(vm_event_states, cpu);
 
-		cpu = next_cpu(cpu, *cpumask);
-
-		if (cpu < NR_CPUS)
-			prefetch(&per_cpu(vm_event_states, cpu));
-
-
 		for (i = 0; i < NR_VM_EVENT_ITEMS; i++)
 			ret[i] += this->event[i];
 	}
@@ -284,6 +277,10 @@ 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 +296,7 @@ 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 +308,19 @@ 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
 		/*
@@ -329,7 +330,7 @@ void refresh_cpu_vm_stats(int cpu)
 		 * Check if there are pages remaining in this pageset
 		 * if not then there is nothing to expire.
 		 */
-		if (!p->expire || (!p->pcp[0].count && !p->pcp[1].count))
+		if (!p->expire || !p->pcp.count)
 			continue;
 
 		/*
@@ -344,13 +345,14 @@ void refresh_cpu_vm_stats(int cpu)
 		if (p->expire)
 			continue;
 
-		if (p->pcp[0].count)
-			drain_zone_pages(zone, p->pcp + 0);
-
-		if (p->pcp[1].count)
-			drain_zone_pages(zone, p->pcp + 1);
+		if (p->pcp.count)
+			drain_zone_pages(zone, &p->pcp);
 #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
@@ -681,20 +683,17 @@ static void zoneinfo_show_print(struct seq_file *m, pg_data_t *pgdat,
 		   "\n  pagesets");
 	for_each_online_cpu(i) {
 		struct per_cpu_pageset *pageset;
-		int j;
 
 		pageset = zone_pcp(zone, i);
-		for (j = 0; j < ARRAY_SIZE(pageset->pcp); j++) {
-			seq_printf(m,
-				   "\n    cpu: %i pcp: %i"
-				   "\n              count: %i"
-				   "\n              high:  %i"
-				   "\n              batch: %i",
-				   i, j,
-				   pageset->pcp[j].count,
-				   pageset->pcp[j].high,
-				   pageset->pcp[j].batch);
-			}
+		seq_printf(m,
+			   "\n    cpu: %i"
+			   "\n              count: %i"
+			   "\n              high:  %i"
+			   "\n              batch: %i",
+			   i,
+			   pageset->pcp.count,
+			   pageset->pcp.high,
+			   pageset->pcp.batch);
 #ifdef CONFIG_SMP
 		seq_printf(m, "\n  vm stats threshold: %d",
 				pageset->stat_threshold);