From 9ee50090441581ad7fda6f78f49c04e250408bf8 Mon Sep 17 00:00:00 2001
From: Adam Litke <agl@us.ibm.com>
Date: Tue, 2 Sep 2008 14:35:38 -0700
Subject: [PATCH] --- yaml --- r: 109403 b: refs/heads/master c:
 344c790e3821dac37eb742ddd0b611a300f78b9a h: refs/heads/master i:   109401:
 46247bb88d04de97a72f7ed80a9f64a712dd5a56   109399:
 0ee4c3080a56ee5db80b0f65412a7fd09bdb5263 v: v3

---
 [refs]                | 2 +-
 trunk/mm/page_alloc.c | 7 +++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index d26d85f78b6a..71b6c810f68e 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 169ccbd44eb20f5bb7e4352451eba25397e29749
+refs/heads/master: 344c790e3821dac37eb742ddd0b611a300f78b9a
diff --git a/trunk/mm/page_alloc.c b/trunk/mm/page_alloc.c
index af982f7cdb2a..feb791648a1f 100644
--- a/trunk/mm/page_alloc.c
+++ b/trunk/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;