diff -r abdce93d4215 -r 363a44995a71 hotspot/src/share/vm/memory/referenceProcessor.hpp
--- a/hotspot/src/share/vm/memory/referenceProcessor.hpp	Wed Feb 05 14:29:34 2014 +0100
+++ b/hotspot/src/share/vm/memory/referenceProcessor.hpp	Thu Feb 06 14:12:43 2014 +0100
@@ -99,6 +99,7 @@
   oop                _referent;
   OopClosure*        _keep_alive;
   BoolObjectClosure* _is_alive;
+  bool               _discovered_list_needs_post_barrier;
 
   DEBUG_ONLY(
   oop                _first_seen; // cyclic linked list check
@@ -112,7 +113,8 @@
 public:
   inline DiscoveredListIterator(DiscoveredList&    refs_list,
                                 OopClosure*        keep_alive,
-                                BoolObjectClosure* is_alive):
+                                BoolObjectClosure* is_alive,
+                                bool               discovered_list_needs_post_barrier = false):
     _refs_list(refs_list),
     _prev_next(refs_list.adr_head()),
     _prev(NULL),
@@ -126,7 +128,8 @@
 #endif
     _next(NULL),
     _keep_alive(keep_alive),
-    _is_alive(is_alive)
+    _is_alive(is_alive),
+    _discovered_list_needs_post_barrier(discovered_list_needs_post_barrier)
 { }
 
   // End Of List.
@@ -228,12 +231,12 @@
   bool        _discovery_is_mt;         // true if reference discovery is MT.
 
   // If true, setting "next" field of a discovered refs list requires
-  // write barrier(s).  (Must be true if used in a collector in which
+  // write post barrier.  (Must be true if used in a collector in which
   // elements of a discovered list may be moved during discovery: for
   // example, a collector like Garbage-First that moves objects during a
   // long-term concurrent marking phase that does weak reference
   // discovery.)
-  bool        _discovered_list_needs_barrier;
+  bool        _discovered_list_needs_post_barrier;
 
   bool        _enqueuing_is_done;       // true if all weak references enqueued
   bool        _processing_is_mt;        // true during phases when
@@ -380,8 +383,8 @@
 
  protected:
   // Set the 'discovered' field of the given reference to
-  // the given value - emitting barriers depending upon
-  // the value of _discovered_list_needs_barrier.
+  // the given value - emitting post barriers depending upon
+  // the value of _discovered_list_needs_post_barrier.
   void set_discovered(oop ref, oop value);
 
   // "Preclean" the given discovered reference list
@@ -425,7 +428,7 @@
                      bool mt_discovery  = false, uint mt_discovery_degree  = 1,
                      bool atomic_discovery = true,
                      BoolObjectClosure* is_alive_non_header = NULL,
-                     bool discovered_list_needs_barrier = false);
+                     bool discovered_list_needs_post_barrier = false);
 
   // RefDiscoveryPolicy values
   enum DiscoveryPolicy {