--- old/src/share/vm/gc/parallel/psCompactionManager.cpp	2016-01-13 15:13:36.431849104 +0100
+++ new/src/share/vm/gc/parallel/psCompactionManager.cpp	2016-01-13 15:13:36.331846149 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 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
@@ -124,6 +124,13 @@
     "Not initialized?");
 }
 
+void ParCompactionManager::reset_cache_for_bitmap() {
+  uint parallel_gc_threads = PSParallelCompact::gc_task_manager()->workers();
+  for (uint i=0; i<=parallel_gc_threads; i++) {
+    _manager_array[i]->set_last_query_begin(NULL);
+  }
+}
+
 int ParCompactionManager::pop_recycled_stack_index() {
   assert(_recycled_bottom <= _recycled_top, "list is empty");
   // Get the next available index