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Diffstat (limited to 'mm/page_alloc.c')
-rw-r--r--mm/page_alloc.c22
1 files changed, 16 insertions, 6 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index af982f7cdb2a..27b8681139fd 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -268,13 +268,14 @@ void prep_compound_page(struct page *page, unsigned long order)
{
int i;
int nr_pages = 1 << order;
+ struct page *p = page + 1;
set_compound_page_dtor(page, free_compound_page);
set_compound_order(page, order);
__SetPageHead(page);
- for (i = 1; i < nr_pages; i++) {
- struct page *p = page + i;
-
+ for (i = 1; i < nr_pages; i++, p++) {
+ if (unlikely((i & (MAX_ORDER_NR_PAGES - 1)) == 0))
+ p = pfn_to_page(page_to_pfn(page) + i);
__SetPageTail(p);
p->first_page = page;
}
@@ -284,6 +285,7 @@ static void destroy_compound_page(struct page *page, unsigned long order)
{
int i;
int nr_pages = 1 << order;
+ struct page *p = page + 1;
if (unlikely(compound_order(page) != order))
bad_page(page);
@@ -291,8 +293,9 @@ static void destroy_compound_page(struct page *page, unsigned long order)
if (unlikely(!PageHead(page)))
bad_page(page);
__ClearPageHead(page);
- for (i = 1; i < nr_pages; i++) {
- struct page *p = page + i;
+ for (i = 1; i < nr_pages; i++, p++) {
+ if (unlikely((i & (MAX_ORDER_NR_PAGES - 1)) == 0))
+ p = pfn_to_page(page_to_pfn(page) + i);
if (unlikely(!PageTail(p) |
(p->first_page != page)))
@@ -694,6 +697,9 @@ static int move_freepages(struct zone *zone,
#endif
for (page = start_page; page <= end_page;) {
+ /* Make sure we are not inadvertently changing nodes */
+ VM_BUG_ON(page_to_nid(page) != zone_to_nid(zone));
+
if (!pfn_valid_within(page_to_pfn(page))) {
page++;
continue;
@@ -2516,6 +2522,10 @@ static void setup_zone_migrate_reserve(struct zone *zone)
continue;
page = pfn_to_page(pfn);
+ /* Watch out for overlapping nodes */
+ if (page_to_nid(page) != zone_to_nid(zone))
+ continue;
+
/* Blocks with reserved pages will never free, skip them. */
if (PageReserved(page))
continue;
@@ -4064,7 +4074,7 @@ void __init set_dma_reserve(unsigned long new_dma_reserve)
}
#ifndef CONFIG_NEED_MULTIPLE_NODES
-struct pglist_data contig_page_data = { .bdata = &bootmem_node_data[0] };
+struct pglist_data __refdata contig_page_data = { .bdata = &bootmem_node_data[0] };
EXPORT_SYMBOL(contig_page_data);
#endif