1 files changed, 26 insertions, 0 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index f4e929e356db..1a3a893ef50e 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3142,6 +3142,32 @@ int zone_wait_table_init(struct zone *zone, unsigned long zone_size_pages)
         return 0;
 }
 
+static int __zone_pcp_update(void *data)
+{
+        struct zone *zone = data;
+        int cpu;
+        unsigned long batch = zone_batchsize(zone), flags;
+
+        for (cpu = 0; cpu < NR_CPUS; cpu++) {
+                struct per_cpu_pageset *pset;
+                struct per_cpu_pages *pcp;
+
+                pset = zone_pcp(zone, cpu);
+                pcp = &pset->pcp;
+
+                local_irq_save(flags);
+                free_pages_bulk(zone, pcp->count, &pcp->list, 0);
+                setup_pageset(pset, batch);
+                local_irq_restore(flags);
+        }
+        return 0;
+}
+
+void zone_pcp_update(struct zone *zone)
+{
+        stop_machine(__zone_pcp_update, zone, NULL);
+}
+
 static __meminit void zone_pcp_init(struct zone *zone)
 {
         int cpu;