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-rw-r--r--mm/page_alloc.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index af982f7cdb2a..feb791648a1f 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -694,6 +694,9 @@ 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 +2519,10 @@ 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;