[PATCH] Do not allocate pagesets for unpopulated zones.

We do not need to allocate pagesets for unpopulated zones.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d0432e44f77d..490aee1f2ce8 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1829,6 +1829,9 @@ static int __cpuinit process_zones(int cpu)
 
         for_each_zone(zone) {
 
+                if (!populated_zone(zone))
+                        continue;
+
                 zone_pcp(zone, cpu) = kmalloc_node(sizeof(struct per_cpu_pageset),
                                          GFP_KERNEL, cpu_to_node(cpu));
                 if (!zone_pcp(zone, cpu))