--- old/src/share/vm/gc/g1/g1RemSet.hpp	2015-12-21 12:23:45.310806514 +0100
+++ new/src/share/vm/gc/g1/g1RemSet.hpp	2015-12-21 12:23:45.218803785 +0100
@@ -75,6 +75,16 @@
   G1ParPushHeapRSClosure** _cset_rs_update_cl;
 
 public:
+  // Gives an approximation on how many threads can be expected to add records to
+  // a remembered set in parallel. This can be used for sizing data structures to
+  // decrease performance losses due to data structure sharing.
+  // Examples for quantities that influence this value are the maximum number of
+  // mutator threads, maximum number of concurrent refinement or GC threads.
+  static uint num_par_rem_sets();
+
+  // Initialize data that depends on that the heap size is known.
+  static void initialize(uint max_regions);
+
   // This is called to reset dual hash tables after the gc pause
   // is finished and the initial hash table is no longer being
   // scanned.