--- old/src/share/vm/gc/cms/parNewGeneration.hpp	2015-07-01 17:50:55.222064796 -0400
+++ new/src/share/vm/gc/cms/parNewGeneration.hpp	2015-07-01 17:50:55.084065686 -0400
@@ -346,13 +346,15 @@
 
   void handle_promotion_failed(GenCollectedHeap* gch, ParScanThreadStateSet& thread_state_set);
 
- protected:
-
   bool _survivor_overflow;
 
   bool survivor_overflow() { return _survivor_overflow; }
   void set_survivor_overflow(bool v) { _survivor_overflow = v; }
 
+  // automatically calculate ParGCCardsPerStrideChunk based on the old
+  // gen capacity before each young GC
+  void adjust_cards_per_stride(const Generation& old_gen);
+
  public:
   ParNewGeneration(ReservedSpace rs, size_t initial_byte_size);