--- old/src/hotspot/share/gc/g1/g1MMUTracker.cpp	2017-10-12 15:56:15.053487380 -0700
+++ new/src/hotspot/share/gc/g1/g1MMUTracker.cpp	2017-10-12 15:56:14.685487393 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2017, 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
@@ -122,7 +122,6 @@
   if (_DISABLE_MMU)
     return 0.0;
 
-  MutexLockerEx x(MMUTracker_lock, Mutex::_no_safepoint_check_flag);
   remove_expired_entries(current_time);
 
   return when_internal(current_time, pause_time);