diff --git a/mm/vmscan.c b/mm/vmscan.c
index dcd90c891d8e53895d117f219001329e8cdeab46..f756a202d5d5a49bdc075c905860563806f701e6 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -3175,7 +3175,7 @@ static unsigned long balance_pgdat(pg_data_t *pgdat, int order,
 		 */
 		if (waitqueue_active(&pgdat->pfmemalloc_wait) &&
 				pfmemalloc_watermark_ok(pgdat))
-			wake_up(&pgdat->pfmemalloc_wait);
+			wake_up_all(&pgdat->pfmemalloc_wait);
 
 		/*
 		 * Fragmentation may mean that the system cannot be rebalanced