[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>

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d0432e4..490aee1 100644 (file)
--- 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))