diff -r 62f8fb907ad5 -r 8bbfb74d1f6c hotspot/src/share/vm/gc/g1/g1CollectorPolicy.hpp
--- a/hotspot/src/share/vm/gc/g1/g1CollectorPolicy.hpp	Tue Nov 10 11:07:15 2015 +0100
+++ b/hotspot/src/share/vm/gc/g1/g1CollectorPolicy.hpp	Tue Nov 10 11:07:15 2015 +0100
@@ -534,6 +534,8 @@
   // as a percentage of the current heap capacity.
   double reclaimable_bytes_perc(size_t reclaimable_bytes) const;
 
+  // Sets up marking if proper conditions are met.
+  void maybe_start_marking();
 public:
 
   G1CollectorPolicy();