--- a/src/hotspot/share/gc/shared/referenceProcessor.hpp	Tue Jun 05 14:55:13 2018 +0200
+++ b/src/hotspot/share/gc/shared/referenceProcessor.hpp	Tue Jun 05 09:15:03 2018 -0400
@@ -320,7 +320,8 @@
   void log_reflist_counts(DiscoveredList ref_lists[], uint num_active_queues) PRODUCT_RETURN;
 
   // Balances reference queues.
-  void balance_queues(DiscoveredList ref_lists[]);
+  void balance_queues(DiscoveredList refs_lists[]);
+  bool need_balance_queues(DiscoveredList refs_lists[]);
 
   // Update (advance) the soft ref master clock field.
   void update_soft_ref_master_clock();