diff -r 82617ab0e8b3 -r cbc7c4c9e11c src/share/vm/gc_implementation/g1/heapRegionRemSet.hpp
--- a/src/share/vm/gc_implementation/g1/heapRegionRemSet.hpp	Fri May 15 06:47:56 2015 +0000
+++ b/src/share/vm/gc_implementation/g1/heapRegionRemSet.hpp	Wed Jan 07 15:15:37 2015 +0100
@@ -181,6 +181,10 @@
   // sense.
   void add_reference(OopOrNarrowOopStar from, int tid);
 
+  // Returns whether this remembered set (and all sub-sets) have an occupancy
+  // that is less or equal than the given occupancy.
+  bool occupancy_less_or_equal_than(size_t limit) const;
+
   // Removes any entries shown by the given bitmaps to contain only dead
   // objects.
   void scrub(CardTableModRefBS* ctbs, BitMap* region_bm, BitMap* card_bm);
@@ -276,6 +280,10 @@
     return (strong_code_roots_list_length() == 0) && _other_regions.is_empty();
   }
 
+  bool occupancy_less_or_equal_than(size_t occ) const {
+    return (strong_code_roots_list_length() == 0) && _other_regions.occupancy_less_or_equal_than(occ);
+  }
+
   size_t occupied() {
     MutexLockerEx x(&_m, Mutex::_no_safepoint_check_flag);
     return occupied_locked();