--- old/src/share/vm/classfile/systemDictionary.cpp	2013-01-08 05:02:13.292634168 -0500
+++ new/src/share/vm/classfile/systemDictionary.cpp	2013-01-08 05:02:11.308525124 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2013, 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
@@ -135,13 +135,18 @@
 bool SystemDictionary::is_parallelCapable(Handle class_loader) {
   if (UnsyncloadClass || class_loader.is_null()) return true;
   if (AlwaysLockClassLoader) return false;
-  return java_lang_ClassLoader::parallelCapable(class_loader());
+  // fullyConcurrent subsumes the parallelCapable test 
+  return java_lang_ClassLoader::fullyConcurrent(class_loader()) ||
+      java_lang_ClassLoader::parallelCapable(class_loader());
 }
 // ----------------------------------------------------------------------------
 // ParallelDefineClass flag does not apply to bootclass loader
 bool SystemDictionary::is_parallelDefine(Handle class_loader) {
    if (class_loader.is_null()) return false;
-   if (AllowParallelDefineClass && java_lang_ClassLoader::parallelCapable(class_loader())) {
+   if (java_lang_ClassLoader::fullyConcurrent(class_loader()) ||
+       AllowParallelDefineClass && java_lang_ClassLoader::parallelCapable(class_loader())) {
+       if (TraceClassLoading)
+           tty->print_cr("Parallel define permitted for loader: " PTR_FORMAT, class_loader());
      return true;
    }
    return false;