Merge branch 'master'

2 files changed, 25 insertions, 7 deletions

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 880831b..67af4ce 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -552,7 +552,7 @@ static void migrate_page_add(struct page *page, struct list_head *pagelist,
 	 */
 	if ((flags & MPOL_MF_MOVE_ALL) || page_mapcount(page) == 1) {
 		if (isolate_lru_page(page))
-			list_add(&page->lru, pagelist);
+			list_add_tail(&page->lru, pagelist);
 	}
 }
 
@@ -569,6 +569,7 @@ static int migrate_pages_to(struct list_head *pagelist,
 	LIST_HEAD(moved);
 	LIST_HEAD(failed);
 	int err = 0;
+	unsigned long offset = 0;
 	int nr_pages;
 	struct page *page;
 	struct list_head *p;
@@ -576,8 +577,21 @@ static int migrate_pages_to(struct list_head *pagelist,
 redo:
 	nr_pages = 0;
 	list_for_each(p, pagelist) {
-		if (vma)
-			page = alloc_page_vma(GFP_HIGHUSER, vma, vma->vm_start);
+		if (vma) {
+			/*
+			 * The address passed to alloc_page_vma is used to
+			 * generate the proper interleave behavior. We fake
+			 * the address here by an increasing offset in order
+			 * to get the proper distribution of pages.
+			 *
+			 * No decision has been made as to which page
+			 * a certain old page is moved to so we cannot
+			 * specify the correct address.
+			 */
+			page = alloc_page_vma(GFP_HIGHUSER, vma,
+					offset + vma->vm_start);
+			offset += PAGE_SIZE;
+		}
 		else
 			page = alloc_pages_node(dest, GFP_HIGHUSER, 0);
 
@@ -585,7 +599,7 @@ redo:
 			err = -ENOMEM;
 			goto out;
 		}
-		list_add(&page->lru, &newlist);
+		list_add_tail(&page->lru, &newlist);
 		nr_pages++;
 		if (nr_pages > MIGRATE_CHUNK_SIZE)
 			break;
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 1838c15..b0af759 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1908,7 +1908,12 @@ int zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order)
 		sc.swap_cluster_max = SWAP_CLUSTER_MAX;
 
 	cond_resched();
-	p->flags |= PF_MEMALLOC;
+	/*
+	 * We need to be able to allocate from the reserves for RECLAIM_SWAP
+	 * and we also need to be able to write out pages for RECLAIM_WRITE
+	 * and RECLAIM_SWAP.
+	 */
+	p->flags |= PF_MEMALLOC | PF_SWAPWRITE;
 	reclaim_state.reclaimed_slab = 0;
 	p->reclaim_state = &reclaim_state;
 
@@ -1932,11 +1937,10 @@ int zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order)
 		 * a long time.
 		 */
 		shrink_slab(sc.nr_scanned, gfp_mask, order);
-		sc.nr_reclaimed = 1;    /* Avoid getting the off node timeout */
 	}
 
 	p->reclaim_state = NULL;
-	current->flags &= ~PF_MEMALLOC;
+	current->flags &= ~(PF_MEMALLOC | PF_SWAPWRITE);
 
 	if (sc.nr_reclaimed == 0)
 		zone->last_unsuccessful_zone_reclaim = jiffies;