diff -r 36d1d483d5d6 -r da91efe96a93 src/share/vm/gc_implementation/parallelScavenge/psTasks.cpp
--- a/src/share/vm/gc_implementation/parallelScavenge/psTasks.cpp	Fri Aug 31 16:39:35 2012 -0700
+++ b/src/share/vm/gc_implementation/parallelScavenge/psTasks.cpp	Sat Sep 01 13:25:18 2012 -0400
@@ -78,7 +78,13 @@
       break;
 
     case system_dictionary:
+      {
       SystemDictionary::oops_do(&roots_closure);
+
+        // Move this to another root_type?
+        PSScavengeKlassClosure klass_closure(pm);
+        ClassLoaderDataGraph::oops_do(&roots_closure, &klass_closure, false);
+      }
       break;
 
     case management: