changeset 1781:c32059ef4dc0

6971296: G1: simplify G1RemSet class hierarchy Summary: Remove G1RemSet base class and StupidG1RemSet class; rename HRInto_G1RemSet to just G1RemSet. Reviewed-by: ysr, tonyp
author johnc
date Tue, 12 Oct 2010 09:36:48 -0700
parents 0715f0cf171d
children b14ec34b1e07
files src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp src/share/vm/gc_implementation/g1/g1OopClosures.hpp src/share/vm/gc_implementation/g1/g1RemSet.cpp src/share/vm/gc_implementation/g1/g1RemSet.hpp src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp src/share/vm/gc_implementation/g1/g1_globals.hpp src/share/vm/gc_implementation/includeDB_gc_g1
diffstat 7 files changed, 97 insertions(+), 180 deletions(-) [+]
line wrap: on
line diff
--- a/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp	Fri Oct 08 09:29:09 2010 -0700
+++ b/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp	Tue Oct 12 09:36:48 2010 -0700
@@ -791,7 +791,7 @@
   int                _worker_i;
 public:
   RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) :
-    _cl(g1->g1_rem_set()->as_HRInto_G1RemSet(), worker_i),
+    _cl(g1->g1_rem_set(), worker_i),
     _worker_i(worker_i),
     _g1h(g1)
   { }
@@ -890,7 +890,7 @@
     abandon_cur_alloc_region();
     abandon_gc_alloc_regions();
     assert(_cur_alloc_region == NULL, "Invariant.");
-    g1_rem_set()->as_HRInto_G1RemSet()->cleanupHRRS();
+    g1_rem_set()->cleanupHRRS();
     tear_down_region_lists();
     set_used_regions_to_need_zero_fill();
 
@@ -1506,15 +1506,11 @@
   }
 
   // Also create a G1 rem set.
-  if (G1UseHRIntoRS) {
-    if (mr_bs()->is_a(BarrierSet::CardTableModRef)) {
-      _g1_rem_set = new HRInto_G1RemSet(this, (CardTableModRefBS*)mr_bs());
-    } else {
-      vm_exit_during_initialization("G1 requires a cardtable mod ref bs.");
-      return JNI_ENOMEM;
-    }
+  if (mr_bs()->is_a(BarrierSet::CardTableModRef)) {
+    _g1_rem_set = new G1RemSet(this, (CardTableModRefBS*)mr_bs());
   } else {
-    _g1_rem_set = new StupidG1RemSet(this);
+    vm_exit_during_initialization("G1 requires a cardtable mod ref bs.");
+    return JNI_ENOMEM;
   }
 
   // Carve out the G1 part of the heap.
@@ -2706,8 +2702,7 @@
 }
 
 size_t G1CollectedHeap::cards_scanned() {
-  HRInto_G1RemSet* g1_rset = (HRInto_G1RemSet*) g1_rem_set();
-  return g1_rset->cardsScanned();
+  return g1_rem_set()->cardsScanned();
 }
 
 void
--- a/src/share/vm/gc_implementation/g1/g1OopClosures.hpp	Fri Oct 08 09:29:09 2010 -0700
+++ b/src/share/vm/gc_implementation/g1/g1OopClosures.hpp	Tue Oct 12 09:36:48 2010 -0700
@@ -25,8 +25,6 @@
 class HeapRegion;
 class G1CollectedHeap;
 class G1RemSet;
-class HRInto_G1RemSet;
-class G1RemSet;
 class ConcurrentMark;
 class DirtyCardToOopClosure;
 class CMBitMap;
--- a/src/share/vm/gc_implementation/g1/g1RemSet.cpp	Fri Oct 08 09:29:09 2010 -0700
+++ b/src/share/vm/gc_implementation/g1/g1RemSet.cpp	Tue Oct 12 09:36:48 2010 -0700
@@ -97,13 +97,6 @@
   }
 };
 
-void
-StupidG1RemSet::oops_into_collection_set_do(OopsInHeapRegionClosure* oc,
-                                            int worker_i) {
-  IntoCSRegionClosure rc(_g1, oc);
-  _g1->heap_region_iterate(&rc);
-}
-
 class VerifyRSCleanCardOopClosure: public OopClosure {
   G1CollectedHeap* _g1;
 public:
@@ -119,8 +112,9 @@
   }
 };
 
-HRInto_G1RemSet::HRInto_G1RemSet(G1CollectedHeap* g1, CardTableModRefBS* ct_bs)
-  : G1RemSet(g1), _ct_bs(ct_bs), _g1p(_g1->g1_policy()),
+G1RemSet::G1RemSet(G1CollectedHeap* g1, CardTableModRefBS* ct_bs)
+  : _g1(g1), _conc_refine_cards(0),
+    _ct_bs(ct_bs), _g1p(_g1->g1_policy()),
     _cg1r(g1->concurrent_g1_refine()),
     _traversal_in_progress(false),
     _cset_rs_update_cl(NULL),
@@ -134,7 +128,7 @@
   }
 }
 
-HRInto_G1RemSet::~HRInto_G1RemSet() {
+G1RemSet::~G1RemSet() {
   delete _seq_task;
   for (uint i = 0; i < n_workers(); i++) {
     assert(_cset_rs_update_cl[i] == NULL, "it should be");
@@ -277,7 +271,7 @@
 //          p threads
 // Then thread t will start at region t * floor (n/p)
 
-HeapRegion* HRInto_G1RemSet::calculateStartRegion(int worker_i) {
+HeapRegion* G1RemSet::calculateStartRegion(int worker_i) {
   HeapRegion* result = _g1p->collection_set();
   if (ParallelGCThreads > 0) {
     size_t cs_size = _g1p->collection_set_size();
@@ -290,7 +284,7 @@
   return result;
 }
 
-void HRInto_G1RemSet::scanRS(OopsInHeapRegionClosure* oc, int worker_i) {
+void G1RemSet::scanRS(OopsInHeapRegionClosure* oc, int worker_i) {
   double rs_time_start = os::elapsedTime();
   HeapRegion *startRegion = calculateStartRegion(worker_i);
 
@@ -340,7 +334,7 @@
   }
 };
 
-void HRInto_G1RemSet::updateRS(DirtyCardQueue* into_cset_dcq, int worker_i) {
+void G1RemSet::updateRS(DirtyCardQueue* into_cset_dcq, int worker_i) {
   double start = os::elapsedTime();
   // Apply the given closure to all remaining log entries.
   RefineRecordRefsIntoCSCardTableEntryClosure into_cset_update_rs_cl(_g1, into_cset_dcq);
@@ -439,12 +433,11 @@
   }
 };
 
-void HRInto_G1RemSet::cleanupHRRS() {
+void G1RemSet::cleanupHRRS() {
   HeapRegionRemSet::cleanup();
 }
 
-void
-HRInto_G1RemSet::oops_into_collection_set_do(OopsInHeapRegionClosure* oc,
+void G1RemSet::oops_into_collection_set_do(OopsInHeapRegionClosure* oc,
                                              int worker_i) {
 #if CARD_REPEAT_HISTO
   ct_freq_update_histo_and_reset();
@@ -508,8 +501,7 @@
   _cset_rs_update_cl[worker_i] = NULL;
 }
 
-void HRInto_G1RemSet::
-prepare_for_oops_into_collection_set_do() {
+void G1RemSet::prepare_for_oops_into_collection_set_do() {
 #if G1_REM_SET_LOGGING
   PrintRSClosure cl;
   _g1->collection_set_iterate(&cl);
@@ -581,7 +573,7 @@
     //   RSet updating,
     // * the post-write barrier shouldn't be logging updates to young
     //   regions (but there is a situation where this can happen - see
-    //   the comment in HRInto_G1RemSet::concurrentRefineOneCard below -
+    //   the comment in G1RemSet::concurrentRefineOneCard below -
     //   that should not be applicable here), and
     // * during actual RSet updating, the filtering of cards in young
     //   regions in HeapRegion::oops_on_card_seq_iterate_careful is
@@ -601,7 +593,7 @@
   }
 };
 
-void HRInto_G1RemSet::cleanup_after_oops_into_collection_set_do() {
+void G1RemSet::cleanup_after_oops_into_collection_set_do() {
   guarantee( _cards_scanned != NULL, "invariant" );
   _total_cards_scanned = 0;
   for (uint i = 0; i < n_workers(); ++i)
@@ -692,12 +684,12 @@
   }
 };
 
-void HRInto_G1RemSet::scrub(BitMap* region_bm, BitMap* card_bm) {
+void G1RemSet::scrub(BitMap* region_bm, BitMap* card_bm) {
   ScrubRSClosure scrub_cl(region_bm, card_bm);
   _g1->heap_region_iterate(&scrub_cl);
 }
 
-void HRInto_G1RemSet::scrub_par(BitMap* region_bm, BitMap* card_bm,
+void G1RemSet::scrub_par(BitMap* region_bm, BitMap* card_bm,
                                 int worker_num, int claim_val) {
   ScrubRSClosure scrub_cl(region_bm, card_bm);
   _g1->heap_region_par_iterate_chunked(&scrub_cl, worker_num, claim_val);
@@ -741,7 +733,7 @@
   virtual void do_oop(narrowOop* p)  { do_oop_nv(p); }
 };
 
-bool HRInto_G1RemSet::concurrentRefineOneCard_impl(jbyte* card_ptr, int worker_i,
+bool G1RemSet::concurrentRefineOneCard_impl(jbyte* card_ptr, int worker_i,
                                                    bool check_for_refs_into_cset) {
   // Construct the region representing the card.
   HeapWord* start = _ct_bs->addr_for(card_ptr);
@@ -820,7 +812,7 @@
   return trigger_cl.value();
 }
 
-bool HRInto_G1RemSet::concurrentRefineOneCard(jbyte* card_ptr, int worker_i,
+bool G1RemSet::concurrentRefineOneCard(jbyte* card_ptr, int worker_i,
                                               bool check_for_refs_into_cset) {
   // If the card is no longer dirty, nothing to do.
   if (*card_ptr != CardTableModRefBS::dirty_card_val()) {
@@ -995,7 +987,7 @@
   }
 };
 
-void HRInto_G1RemSet::print_summary_info() {
+void G1RemSet::print_summary_info() {
   G1CollectedHeap* g1 = G1CollectedHeap::heap();
 
 #if CARD_REPEAT_HISTO
@@ -1029,30 +1021,26 @@
   g1->concurrent_g1_refine()->threads_do(&p);
   gclog_or_tty->print_cr("");
 
-  if (G1UseHRIntoRS) {
-    HRRSStatsIter blk;
-    g1->heap_region_iterate(&blk);
-    gclog_or_tty->print_cr("  Total heap region rem set sizes = " SIZE_FORMAT "K."
-                           "  Max = " SIZE_FORMAT "K.",
-                           blk.total_mem_sz()/K, blk.max_mem_sz()/K);
-    gclog_or_tty->print_cr("  Static structures = " SIZE_FORMAT "K,"
-                           " free_lists = " SIZE_FORMAT "K.",
-                           HeapRegionRemSet::static_mem_size()/K,
-                           HeapRegionRemSet::fl_mem_size()/K);
-    gclog_or_tty->print_cr("    %d occupied cards represented.",
-                           blk.occupied());
-    gclog_or_tty->print_cr("    Max sz region = [" PTR_FORMAT ", " PTR_FORMAT " )"
-                           ", cap = " SIZE_FORMAT "K, occ = " SIZE_FORMAT "K.",
-                           blk.max_mem_sz_region()->bottom(), blk.max_mem_sz_region()->end(),
-                           (blk.max_mem_sz_region()->rem_set()->mem_size() + K - 1)/K,
-                           (blk.max_mem_sz_region()->rem_set()->occupied() + K - 1)/K);
-    gclog_or_tty->print_cr("    Did %d coarsenings.",
-                  HeapRegionRemSet::n_coarsenings());
-
-  }
+  HRRSStatsIter blk;
+  g1->heap_region_iterate(&blk);
+  gclog_or_tty->print_cr("  Total heap region rem set sizes = " SIZE_FORMAT "K."
+                         "  Max = " SIZE_FORMAT "K.",
+                         blk.total_mem_sz()/K, blk.max_mem_sz()/K);
+  gclog_or_tty->print_cr("  Static structures = " SIZE_FORMAT "K,"
+                         " free_lists = " SIZE_FORMAT "K.",
+                         HeapRegionRemSet::static_mem_size()/K,
+                         HeapRegionRemSet::fl_mem_size()/K);
+  gclog_or_tty->print_cr("    %d occupied cards represented.",
+                         blk.occupied());
+  gclog_or_tty->print_cr("    Max sz region = [" PTR_FORMAT ", " PTR_FORMAT " )"
+                         ", cap = " SIZE_FORMAT "K, occ = " SIZE_FORMAT "K.",
+                         blk.max_mem_sz_region()->bottom(), blk.max_mem_sz_region()->end(),
+                         (blk.max_mem_sz_region()->rem_set()->mem_size() + K - 1)/K,
+                         (blk.max_mem_sz_region()->rem_set()->occupied() + K - 1)/K);
+  gclog_or_tty->print_cr("    Did %d coarsenings.", HeapRegionRemSet::n_coarsenings());
 }
 
-void HRInto_G1RemSet::prepare_for_verify() {
+void G1RemSet::prepare_for_verify() {
   if (G1HRRSFlushLogBuffersOnVerify &&
       (VerifyBeforeGC || VerifyAfterGC)
       &&  !_g1->full_collection()) {
--- a/src/share/vm/gc_implementation/g1/g1RemSet.hpp	Fri Oct 08 09:29:09 2010 -0700
+++ b/src/share/vm/gc_implementation/g1/g1RemSet.hpp	Tue Oct 12 09:36:48 2010 -0700
@@ -27,107 +27,18 @@
 
 class G1CollectedHeap;
 class CardTableModRefBarrierSet;
-class HRInto_G1RemSet;
 class ConcurrentG1Refine;
 
+// A G1RemSet in which each heap region has a rem set that records the
+// external heap references into it.  Uses a mod ref bs to track updates,
+// so that they can be used to update the individual region remsets.
+
 class G1RemSet: public CHeapObj {
 protected:
   G1CollectedHeap* _g1;
   unsigned _conc_refine_cards;
   size_t n_workers();
 
-public:
-  G1RemSet(G1CollectedHeap* g1) :
-    _g1(g1), _conc_refine_cards(0)
-  {}
-
-  // Invoke "blk->do_oop" on all pointers into the CS in object in regions
-  // outside the CS (having invoked "blk->set_region" to set the "from"
-  // region correctly beforehand.) The "worker_i" param is for the
-  // parallel case where the number of the worker thread calling this
-  // function can be helpful in partitioning the work to be done. It
-  // should be the same as the "i" passed to the calling thread's
-  // work(i) function. In the sequential case this param will be ingored.
-  virtual void oops_into_collection_set_do(OopsInHeapRegionClosure* blk,
-                                           int worker_i) = 0;
-
-  // Prepare for and cleanup after an oops_into_collection_set_do
-  // call.  Must call each of these once before and after (in sequential
-  // code) any threads call oops into collection set do.  (This offers an
-  // opportunity to sequential setup and teardown of structures needed by a
-  // parallel iteration over the CS's RS.)
-  virtual void prepare_for_oops_into_collection_set_do() = 0;
-  virtual void cleanup_after_oops_into_collection_set_do() = 0;
-
-  // If "this" is of the given subtype, return "this", else "NULL".
-  virtual HRInto_G1RemSet* as_HRInto_G1RemSet() { return NULL; }
-
-  // Record, if necessary, the fact that *p (where "p" is in region "from",
-  // and is, a fortiori, required to be non-NULL) has changed to its new value.
-  virtual void write_ref(HeapRegion* from, oop* p) = 0;
-  virtual void write_ref(HeapRegion* from, narrowOop* p) = 0;
-  virtual void par_write_ref(HeapRegion* from, oop* p, int tid) = 0;
-  virtual void par_write_ref(HeapRegion* from, narrowOop* p, int tid) = 0;
-
-  // Requires "region_bm" and "card_bm" to be bitmaps with 1 bit per region
-  // or card, respectively, such that a region or card with a corresponding
-  // 0 bit contains no part of any live object.  Eliminates any remembered
-  // set entries that correspond to dead heap ranges.
-  virtual void scrub(BitMap* region_bm, BitMap* card_bm) = 0;
-  // Like the above, but assumes is called in parallel: "worker_num" is the
-  // parallel thread id of the current thread, and "claim_val" is the
-  // value that should be used to claim heap regions.
-  virtual void scrub_par(BitMap* region_bm, BitMap* card_bm,
-                         int worker_num, int claim_val) = 0;
-
-  // Refine the card corresponding to "card_ptr".  If "sts" is non-NULL,
-  // join and leave around parts that must be atomic wrt GC.  (NULL means
-  // being done at a safepoint.)
-  // With some implementations of this routine, when check_for_refs_into_cset
-  // is true, a true result may be returned if the given card contains oops
-  // that have references into the current collection set.
-  virtual bool concurrentRefineOneCard(jbyte* card_ptr, int worker_i,
-                                       bool check_for_refs_into_cset) {
-    return false;
-  }
-
-  // Print any relevant summary info.
-  virtual void print_summary_info() {}
-
-  // Prepare remebered set for verification.
-  virtual void prepare_for_verify() {};
-};
-
-
-// The simplest possible G1RemSet: iterates over all objects in non-CS
-// regions, searching for pointers into the CS.
-class StupidG1RemSet: public G1RemSet {
-public:
-  StupidG1RemSet(G1CollectedHeap* g1) : G1RemSet(g1) {}
-
-  void oops_into_collection_set_do(OopsInHeapRegionClosure* blk,
-                                   int worker_i);
-
-  void prepare_for_oops_into_collection_set_do() {}
-  void cleanup_after_oops_into_collection_set_do() {}
-
-  // Nothing is necessary in the version below.
-  void write_ref(HeapRegion* from, oop* p) {}
-  void write_ref(HeapRegion* from, narrowOop* p) {}
-  void par_write_ref(HeapRegion* from, oop* p, int tid) {}
-  void par_write_ref(HeapRegion* from, narrowOop* p, int tid) {}
-
-  void scrub(BitMap* region_bm, BitMap* card_bm) {}
-  void scrub_par(BitMap* region_bm, BitMap* card_bm,
-                 int worker_num, int claim_val) {}
-
-};
-
-// A G1RemSet in which each heap region has a rem set that records the
-// external heap references into it.  Uses a mod ref bs to track updates,
-// so that they can be used to update the individual region remsets.
-
-class HRInto_G1RemSet: public G1RemSet {
 protected:
   enum SomePrivateConstants {
     UpdateRStoMergeSync  = 0,
@@ -175,28 +86,32 @@
   // scanned.
   void cleanupHRRS();
 
-  HRInto_G1RemSet(G1CollectedHeap* g1, CardTableModRefBS* ct_bs);
-  ~HRInto_G1RemSet();
+  G1RemSet(G1CollectedHeap* g1, CardTableModRefBS* ct_bs);
+  ~G1RemSet();
 
+  // Invoke "blk->do_oop" on all pointers into the CS in objects in regions
+  // outside the CS (having invoked "blk->set_region" to set the "from"
+  // region correctly beforehand.) The "worker_i" param is for the
+  // parallel case where the number of the worker thread calling this
+  // function can be helpful in partitioning the work to be done. It
+  // should be the same as the "i" passed to the calling thread's
+  // work(i) function. In the sequential case this param will be ingored.
   void oops_into_collection_set_do(OopsInHeapRegionClosure* blk,
                                    int worker_i);
 
+  // Prepare for and cleanup after an oops_into_collection_set_do
+  // call.  Must call each of these once before and after (in sequential
+  // code) any threads call oops_into_collection_set_do.  (This offers an
+  // opportunity to sequential setup and teardown of structures needed by a
+  // parallel iteration over the CS's RS.)
   void prepare_for_oops_into_collection_set_do();
   void cleanup_after_oops_into_collection_set_do();
+
   void scanRS(OopsInHeapRegionClosure* oc, int worker_i);
-  template <class T> void scanNewRefsRS_work(OopsInHeapRegionClosure* oc, int worker_i);
-  void scanNewRefsRS(OopsInHeapRegionClosure* oc, int worker_i) {
-    if (UseCompressedOops) {
-      scanNewRefsRS_work<narrowOop>(oc, worker_i);
-    } else {
-      scanNewRefsRS_work<oop>(oc, worker_i);
-    }
-  }
   void updateRS(DirtyCardQueue* into_cset_dcq, int worker_i);
+
   HeapRegion* calculateStartRegion(int i);
 
-  HRInto_G1RemSet* as_HRInto_G1RemSet() { return this; }
-
   CardTableModRefBS* ct_bs() { return _ct_bs; }
   size_t cardsScanned() { return _total_cards_scanned; }
 
@@ -219,17 +134,31 @@
 
   bool self_forwarded(oop obj);
 
+  // Requires "region_bm" and "card_bm" to be bitmaps with 1 bit per region
+  // or card, respectively, such that a region or card with a corresponding
+  // 0 bit contains no part of any live object.  Eliminates any remembered
+  // set entries that correspond to dead heap ranges.
   void scrub(BitMap* region_bm, BitMap* card_bm);
+
+  // Like the above, but assumes is called in parallel: "worker_num" is the
+  // parallel thread id of the current thread, and "claim_val" is the
+  // value that should be used to claim heap regions.
   void scrub_par(BitMap* region_bm, BitMap* card_bm,
                  int worker_num, int claim_val);
 
-  // If check_for_refs_into_cset is true then a true result is returned
-  // if the card contains oops that have references into the current
-  // collection set.
+  // Refine the card corresponding to "card_ptr".  If "sts" is non-NULL,
+  // join and leave around parts that must be atomic wrt GC.  (NULL means
+  // being done at a safepoint.)
+  // If check_for_refs_into_cset is true, a true result is returned
+  // if the given card contains oops that have references into the
+  // current collection set.
   virtual bool concurrentRefineOneCard(jbyte* card_ptr, int worker_i,
                                        bool check_for_refs_into_cset);
 
+  // Print any relevant summary info.
   virtual void print_summary_info();
+
+  // Prepare remembered set for verification.
   virtual void prepare_for_verify();
 };
 
@@ -250,13 +179,13 @@
 
 class UpdateRSOopClosure: public OopClosure {
   HeapRegion* _from;
-  HRInto_G1RemSet* _rs;
+  G1RemSet* _rs;
   int _worker_i;
 
   template <class T> void do_oop_work(T* p);
 
 public:
-  UpdateRSOopClosure(HRInto_G1RemSet* rs, int worker_i = 0) :
+  UpdateRSOopClosure(G1RemSet* rs, int worker_i = 0) :
     _from(NULL), _rs(rs), _worker_i(worker_i) {
     guarantee(_rs != NULL, "Requires an HRIntoG1RemSet");
   }
--- a/src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp	Fri Oct 08 09:29:09 2010 -0700
+++ b/src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp	Tue Oct 12 09:36:48 2010 -0700
@@ -30,16 +30,18 @@
   }
 }
 
-template <class T> inline void HRInto_G1RemSet::write_ref_nv(HeapRegion* from, T* p) {
+template <class T>
+inline void G1RemSet::write_ref_nv(HeapRegion* from, T* p) {
   par_write_ref_nv(from, p, 0);
 }
 
-inline bool HRInto_G1RemSet::self_forwarded(oop obj) {
+inline bool G1RemSet::self_forwarded(oop obj) {
   bool result =  (obj->is_forwarded() && (obj->forwardee()== obj));
   return result;
 }
 
-template <class T> inline void HRInto_G1RemSet::par_write_ref_nv(HeapRegion* from, T* p, int tid) {
+template <class T>
+inline void G1RemSet::par_write_ref_nv(HeapRegion* from, T* p, int tid) {
   oop obj = oopDesc::load_decode_heap_oop(p);
 #ifdef ASSERT
   // can't do because of races
@@ -77,7 +79,7 @@
       // Deferred updates to the CSet are either discarded (in the normal case),
       // or processed (if an evacuation failure occurs) at the end
       // of the collection.
-      // See HRInto_G1RemSet::cleanup_after_oops_into_collection_set_do().
+      // See G1RemSet::cleanup_after_oops_into_collection_set_do().
     } else {
 #if G1_REM_SET_LOGGING
       gclog_or_tty->print_cr("Adding " PTR_FORMAT " (" PTR_FORMAT ") to RS"
@@ -91,12 +93,14 @@
   }
 }
 
-template <class T> inline void UpdateRSOopClosure::do_oop_work(T* p) {
+template <class T>
+inline void UpdateRSOopClosure::do_oop_work(T* p) {
   assert(_from != NULL, "from region must be non-NULL");
   _rs->par_write_ref(_from, p, _worker_i);
 }
 
-template <class T> inline void UpdateRSetImmediate::do_oop_work(T* p) {
+template <class T>
+inline void UpdateRSetImmediate::do_oop_work(T* p) {
   assert(_from->is_in_reserved(p), "paranoia");
   T heap_oop = oopDesc::load_heap_oop(p);
   if (!oopDesc::is_null(heap_oop) && !_from->is_survivor()) {
--- a/src/share/vm/gc_implementation/g1/g1_globals.hpp	Fri Oct 08 09:29:09 2010 -0700
+++ b/src/share/vm/gc_implementation/g1/g1_globals.hpp	Tue Oct 12 09:36:48 2010 -0700
@@ -40,9 +40,6 @@
   develop(intx, G1PolicyVerbose, 0,                                         \
           "The verbosity level on G1 policy decisions")                     \
                                                                             \
-  develop(bool, G1UseHRIntoRS, true,                                        \
-          "Determines whether the 'advanced' HR Into rem set is used.")     \
-                                                                            \
   develop(intx, G1MarkingVerboseLevel, 0,                                   \
           "Level (0-4) of verboseness of the marking code")                 \
                                                                             \
--- a/src/share/vm/gc_implementation/includeDB_gc_g1	Fri Oct 08 09:29:09 2010 -0700
+++ b/src/share/vm/gc_implementation/includeDB_gc_g1	Tue Oct 12 09:36:48 2010 -0700
@@ -310,10 +310,16 @@
 
 heapRegionSeq.inline.hpp                heapRegionSeq.hpp
 
+instanceKlass.cpp                       g1RemSet.inline.hpp
+
+instanceRefKlass.cpp                    g1RemSet.inline.hpp
+
 klass.hpp				g1OopClosures.hpp
 
 memoryService.cpp                       g1MemoryPool.hpp
 
+objArrayKlass.cpp                       g1RemSet.inline.hpp
+
 ptrQueue.cpp                            allocation.hpp
 ptrQueue.cpp                            allocation.inline.hpp
 ptrQueue.cpp                            mutex.hpp