On Thu, 8 Oct 2009, Lee Schermerhorn wrote:

> @@ -1144,14 +1156,15 @@ static void __init report_hugepages(void
>  }
>
>  #ifdef CONFIG_HIGHMEM
> -static void try_to_free_low(struct hstate *h, unsigned long count)
> +static void try_to_free_low(struct hstate *h, unsigned long count,
> +						nodemask_t *nodes_allowed)
>  {
>  	int i;
>
>  	if (h->order >= MAX_ORDER)
>  		return;
>
> -	for (i = 0; i < MAX_NUMNODES; ++i) {
> +	for_each_node_mask(node, nodes_allowed_) {
>  		struct page *page, *next;
>  		struct list_head *freel = &h->hugepage_freelists[i];
>  		list_for_each_entry_safe(page, next, freel, lru) {

That's not looking good for i386, Andrew please fold the following into
this patch when it's merged into -mm:

[rientjes@google.com: fix HIGHMEM compile error]
Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Lee Schermerhorn <lee.schermerhorn@hp.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Nishanth Aravamudan <nacc@us.ibm.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Adam Litke <agl@us.ibm.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Eric Whitney <eric.whitney@hp.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

mm/hugetlb.c

@@ -1164,7 +1164,7 @@ static void try_to_free_low(struct hstate *h, unsigned long count,
 	if (h->order >= MAX_ORDER)
 		return;
 
-	for_each_node_mask(node, nodes_allowed_) {
+	for_each_node_mask(i, *nodes_allowed) {
 		struct page *page, *next;
 		struct list_head *freel = &h->hugepage_freelists[i];
 		list_for_each_entry_safe(page, next, freel, lru) {