diff -r 314741ca98d5 -r 2e75eb109278 hotspot/src/share/vm/gc/shared/taskqueue.hpp
--- a/hotspot/src/share/vm/gc/shared/taskqueue.hpp	Tue Jun 21 19:29:39 2016 -0400
+++ b/hotspot/src/share/vm/gc/shared/taskqueue.hpp	Wed Jun 22 10:34:01 2016 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -330,6 +330,8 @@
 
   // Push task t onto the queue or onto the overflow stack.  Return true.
   inline bool push(E t);
+  // Try to push task t onto the queue only. Returns true if successful, false otherwise.
+  inline bool try_push_to_taskqueue(E t);
 
   // Attempt to pop from the overflow stack; return true if anything was popped.
   inline bool pop_overflow(E& t);