--- a/hotspot/src/share/vm/gc/g1/g1CollectedHeap.cpp	Fri Oct 30 10:15:06 2015 +0100
+++ b/hotspot/src/share/vm/gc/g1/g1CollectedHeap.cpp	Sat Oct 31 15:27:48 2015 +0100
@@ -3826,7 +3826,7 @@
     workers()->set_active_workers(active_workers);
 
     double pause_start_sec = os::elapsedTime();
-    g1_policy()->phase_times()->note_gc_start(active_workers, collector_state()->mark_in_progress());
+    g1_policy()->note_gc_start(active_workers);
     log_gc_header();
 
     TraceCollectorStats tcs(g1mm()->incremental_collection_counters());

--- a/hotspot/src/share/vm/gc/g1/g1CollectorPolicy.cpp	Fri Oct 30 10:15:06 2015 +0100
+++ b/hotspot/src/share/vm/gc/g1/g1CollectorPolicy.cpp	Sat Oct 31 15:27:48 2015 +0100
@@ -437,6 +437,10 @@
   start_incremental_cset_building();
 }
 
+void G1CollectorPolicy::note_gc_start(uint num_active_workers) {
+  phase_times()->note_gc_start(num_active_workers);
+}
+
 // Create the jstat counters for the policy.
 void G1CollectorPolicy::initialize_gc_policy_counters() {
   _gc_policy_counters = new GCPolicyCounters("GarbageFirst", 1, 3);

--- a/hotspot/src/share/vm/gc/g1/g1CollectorPolicy.hpp	Fri Oct 30 10:15:06 2015 +0100
+++ b/hotspot/src/share/vm/gc/g1/g1CollectorPolicy.hpp	Sat Oct 31 15:27:48 2015 +0100
@@ -549,6 +549,8 @@
 
   void init();
 
+  virtual void note_gc_start(uint num_active_workers);
+
   // Create jstat counters for the policy.
   virtual void initialize_gc_policy_counters();
 

--- a/hotspot/src/share/vm/gc/g1/g1GCPhaseTimes.cpp	Fri Oct 30 10:15:06 2015 +0100
+++ b/hotspot/src/share/vm/gc/g1/g1GCPhaseTimes.cpp	Sat Oct 31 15:27:48 2015 +0100
@@ -136,7 +136,7 @@
   _gc_par_phases[RedirtyCards]->link_thread_work_items(_redirtied_cards);
 }
 
-void G1GCPhaseTimes::note_gc_start(uint active_gc_threads, bool mark_in_progress) {
+void G1GCPhaseTimes::note_gc_start(uint active_gc_threads) {
   assert(active_gc_threads > 0, "The number of threads must be > 0");
   assert(active_gc_threads <= _max_gc_threads, "The number of active threads must be <= the max number of threads");
   _active_gc_threads = active_gc_threads;

--- a/hotspot/src/share/vm/gc/g1/g1GCPhaseTimes.hpp	Fri Oct 30 10:15:06 2015 +0100
+++ b/hotspot/src/share/vm/gc/g1/g1GCPhaseTimes.hpp	Sat Oct 31 15:27:48 2015 +0100
@@ -125,7 +125,7 @@
 
  public:
   G1GCPhaseTimes(uint max_gc_threads);
-  void note_gc_start(uint active_gc_threads, bool mark_in_progress);
+  void note_gc_start(uint active_gc_threads);
   void print(double pause_time_sec);
 
   // record the time a phase took in seconds