--- old/src/hotspot/share/gc/g1/g1Policy.hpp	2020-02-19 11:43:20.325834507 +0100
+++ new/src/hotspot/share/gc/g1/g1Policy.hpp	2020-02-19 11:43:19.906821417 +0100
@@ -110,6 +110,10 @@
   // young GC phase.
   size_t _bytes_allocated_in_old_since_last_gc;
 
+  size_t _minimum_desired_bytes_after_last_cm;
+
+  void determine_desired_bytes_after_concurrent_mark();
+
   G1InitialMarkToMixedTimeTracker _initial_mark_to_mixed;
 
   bool should_update_surv_rate_group_predictors() {
@@ -338,8 +342,8 @@
 
   void print_phases();
 
-  bool next_gc_should_be_mixed(const char* true_action_str,
-                               const char* false_action_str) const;
+  bool next_gc_should_be_mixed(const char* true_action_str = NULL,
+                               const char* false_action_str = NULL) const;
 
   // Calculate and return the number of initial and optional old gen regions from
   // the given collection set candidates and the remaining time.
@@ -377,6 +381,8 @@
   // the initial-mark work and start a marking cycle.
   void decide_on_conc_mark_initiation();
 
+  size_t desired_bytes_after_concurrent_mark() const { return _minimum_desired_bytes_after_last_cm; }
+
   size_t young_list_target_length() const { return _young_list_target_length; }
 
   bool should_allocate_mutator_region() const;
@@ -444,6 +450,7 @@
   virtual bool force_upgrade_to_full() {
     return false;
   }
+  size_t desired_bytes_after_concurrent_mark(size_t used_bytes);
 };
 
 #endif // SHARE_GC_G1_G1POLICY_HPP