1 files changed, 20 insertions, 0 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 676aec93d699..e1d87ee1d9c6 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -765,6 +765,23 @@ int move_freepages_block(struct zone *zone, struct page *page, int migratetype)
         return move_freepages(zone, start_page, end_page, migratetype);
 }
 
+/* Return the page with the lowest PFN in the list */
+static struct page *min_page(struct list_head *list)
+{
+        unsigned long min_pfn = -1UL;
+        struct page *min_page = NULL, *page;;
+
+        list_for_each_entry(page, list, lru) {
+                unsigned long pfn = page_to_pfn(page);
+                if (pfn < min_pfn) {
+                        min_pfn = pfn;
+                        min_page = page;
+                }
+        }
+
+        return min_page;
+}
+
 /* Remove an element from the buddy allocator from the fallback list */
 static struct page *__rmqueue_fallback(struct zone *zone, int order,
                                                 int start_migratetype)
@@ -795,8 +812,11 @@ retry:
                         if (list_empty(&area->free_list[migratetype]))
                                 continue;
 
+                        /* Bias kernel allocations towards low pfns */
                         page = list_entry(area->free_list[migratetype].next,
                                         struct page, lru);
+                        if (unlikely(start_migratetype != MIGRATE_MOVABLE))
+                                page = min_page(&area->free_list[migratetype]);
                         area->nr_free--;
 
                         /*