--- old/src/share/vm/oops/instanceRefKlass.hpp	2017-04-25 11:30:59.776795557 +0200
+++ new/src/share/vm/oops/instanceRefKlass.hpp	2017-04-25 11:30:59.600788639 +0200
@@ -118,12 +118,12 @@
   template <typename T, class OopClosureType>
   static bool try_discover(oop obj, ReferenceType type, OopClosureType* closure);
 
-  // Do discovery while handling instance ref klasses, does reference
-  // processing only if a ReferenceProcessor has been supplied.
+  // Do discovery while handling InstanceRefKlasses. Reference discovery
+  // is only done if the closure provides a ReferenceProcessor.
   template <bool nv, typename T, class OopClosureType, class Contains>
   static void oop_oop_iterate_discovery(oop obj, ReferenceType type, OopClosureType* closure, Contains& contains);
 
-  // Handle the fields, don't care about reference processing.
+  // Apply the closure to all fields. No reference discovery is done.
   template <bool nv, typename T, class OopClosureType, class Contains>
   static void oop_oop_iterate_fields(oop obj, OopClosureType* closure, Contains& contains);