diff -r 59f139e8a8d1 -r 96b229c54d1e src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp
--- a/src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp	Wed Mar 25 10:36:08 2009 -0400
+++ b/src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp	Wed Mar 25 13:10:54 2009 -0700
@@ -29,7 +29,6 @@
 
 class HeapRegion;
 class HeapRegionSeq;
-class HeapRegionList;
 class PermanentGenerationSpec;
 class GenerationSpec;
 class OopsInHeapRegionClosure;
@@ -143,7 +142,6 @@
   friend class VM_GenCollectForPermanentAllocation;
   friend class VM_G1CollectFull;
   friend class VM_G1IncCollectionPause;
-  friend class VM_G1PopRegionCollectionPause;
   friend class VMStructs;
 
   // Closures used in implementation.
@@ -253,10 +251,6 @@
   // than the current allocation region.
   size_t _summary_bytes_used;
 
-  // Summary information about popular objects; method to print it.
-  NumberSeq _pop_obj_rc_at_copy;
-  void print_popularity_summary_info() const;
-
   // This is used for a quick test on whether a reference points into
   // the collection set or not. Basically, we have an array, with one
   // byte per region, and that byte denotes whether the corresponding
@@ -447,10 +441,8 @@
   virtual void do_collection_pause();
 
   // The guts of the incremental collection pause, executed by the vm
-  // thread.  If "popular_region" is non-NULL, this pause should evacuate
-  // this single region whose remembered set has gotten large, moving
-  // any popular objects to one of the popular regions.
-  virtual void do_collection_pause_at_safepoint(HeapRegion* popular_region);
+  // thread.
+  virtual void do_collection_pause_at_safepoint();
 
   // Actually do the work of evacuating the collection set.
   virtual void evacuate_collection_set();
@@ -625,67 +617,10 @@
 
   SubTasksDone* _process_strong_tasks;
 
-  // Allocate space to hold a popular object.  Result is guaranteed below
-  // "popular_object_boundary()".  Note: CURRENTLY halts the system if we
-  // run out of space to hold popular objects.
-  HeapWord* allocate_popular_object(size_t word_size);
-
-  // The boundary between popular and non-popular objects.
-  HeapWord* _popular_object_boundary;
-
-  HeapRegionList* _popular_regions_to_be_evacuated;
-
-  // Compute which objects in "single_region" are popular.  If any are,
-  // evacuate them to a popular region, leaving behind forwarding pointers,
-  // and select "popular_region" as the single collection set region.
-  // Otherwise, leave the collection set null.
-  void popularity_pause_preamble(HeapRegion* populer_region);
-
-  // Compute which objects in "single_region" are popular, and evacuate
-  // them to a popular region, leaving behind forwarding pointers.
-  // Returns "true" if at least one popular object is discovered and
-  // evacuated.  In any case, "*max_rc" is set to the maximum reference
-  // count of an object in the region.
-  bool compute_reference_counts_and_evac_popular(HeapRegion* populer_region,
-                                                 size_t* max_rc);
-  // Subroutines used in the above.
-  bool _rc_region_above;
-  size_t _rc_region_diff;
-  jint* obj_rc_addr(oop obj) {
-    uintptr_t obj_addr = (uintptr_t)obj;
-    if (_rc_region_above) {
-      jint* res = (jint*)(obj_addr + _rc_region_diff);
-      assert((uintptr_t)res > obj_addr, "RC region is above.");
-      return res;
-    } else {
-      jint* res = (jint*)(obj_addr - _rc_region_diff);
-      assert((uintptr_t)res < obj_addr, "RC region is below.");
-      return res;
-    }
-  }
-  jint obj_rc(oop obj) {
-    return *obj_rc_addr(obj);
-  }
-  void inc_obj_rc(oop obj) {
-    (*obj_rc_addr(obj))++;
-  }
-  void atomic_inc_obj_rc(oop obj);
-
-
-  // Number of popular objects and bytes (latter is cheaper!).
-  size_t pop_object_used_objs();
-  size_t pop_object_used_bytes();
-
-  // Index of the popular region in which allocation is currently being
-  // done.
-  int _cur_pop_hr_index;
-
   // List of regions which require zero filling.
   UncleanRegionList _unclean_region_list;
   bool _unclean_regions_coming;
 
-  bool check_age_cohort_well_formed_work(int a, HeapRegion* hr);
-
 public:
   void set_refine_cte_cl_concurrency(bool concurrent);
 
@@ -1066,21 +1001,6 @@
   // words.
   virtual size_t large_typearray_limit();
 
-  // All popular objects are guaranteed to have addresses below this
-  // boundary.
-  HeapWord* popular_object_boundary() {
-    return _popular_object_boundary;
-  }
-
-  // Declare the region as one that should be evacuated because its
-  // remembered set is too large.
-  void schedule_popular_region_evac(HeapRegion* r);
-  // If there is a popular region to evacuate it, remove it from the list
-  // and return it.
-  HeapRegion* popular_region_to_evac();
-  // Evacuate the given popular region.
-  void evac_popular_region(HeapRegion* r);
-
   // Returns "true" iff the given word_size is "very large".
   static bool isHumongous(size_t word_size) {
     return word_size >= VeryLargeInWords;