diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 7144649..f5b59e1 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -1618,9 +1618,9 @@
 			return false;
 
 		/*
-		 * Sole queue user, allow bigger slice
+		 * Sole queue user, no limit
 		 */
-		max_dispatch *= 4;
+		max_dispatch = -1;
 	}
 
 	/*