X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=mm%2Fvmscan.c;h=777af57fd8c8c80971d7abaf4edb974e360288c9;hb=849e8dea099aafa56db9e74b580b0d858b956533;hp=64e438898832371277e8baeb89fd5ebb1f72a14a;hpb=2071a0084a0323697b7d6fd5a98982194bd6929f;p=pandora-kernel.git

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 64e438898832..777af57fd8c8 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -544,6 +544,16 @@ redo:
 		 */
 		lru = LRU_UNEVICTABLE;
 		add_page_to_unevictable_list(page);
+		/*
+		 * When racing with an mlock clearing (page is
+		 * unlocked), make sure that if the other thread does
+		 * not observe our setting of PG_lru and fails
+		 * isolation, we see PG_mlocked cleared below and move
+		 * the page back to the evictable list.
+		 *
+		 * The other side is TestClearPageMlocked().
+		 */
+		smp_mb();
 	}
 
 	/*
@@ -1088,7 +1098,7 @@ static unsigned long shrink_inactive_list(unsigned long max_scan,
 	int lumpy_reclaim = 0;
 
 	while (unlikely(too_many_isolated(zone, file, sc))) {
-		congestion_wait(WRITE, HZ/10);
+		congestion_wait(BLK_RW_ASYNC, HZ/10);
 
 		/* We are about to die and free our memory. Return now. */
 		if (fatal_signal_pending(current))
@@ -1356,7 +1366,7 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone,
 			 * IO, plus JVM can create lots of anon VM_EXEC pages,
 			 * so we ignore them here.
 			 */
-			if ((vm_flags & VM_EXEC) && !PageAnon(page)) {
+			if ((vm_flags & VM_EXEC) && page_is_file_cache(page)) {
 				list_add(&page->lru, &l_active);
 				continue;
 			}