--- a/hotspot/src/share/vm/gc/g1/g1RemSet.cpp	Mon Nov 09 09:19:39 2015 +0100
+++ b/hotspot/src/share/vm/gc/g1/g1RemSet.cpp	Mon Nov 09 11:26:15 2015 +0100
@@ -45,7 +45,8 @@
     _ct_bs(ct_bs), _g1p(_g1->g1_policy()),
     _cg1r(g1->concurrent_g1_refine()),
     _cset_rs_update_cl(NULL),
-    _prev_period_summary()
+    _prev_period_summary(),
+    _into_cset_dirty_card_queue_set(false)
 {
   _cset_rs_update_cl = NEW_C_HEAP_ARRAY(G1ParPushHeapRSClosure*, n_workers(), mtGC);
   for (uint i = 0; i < n_workers(); i++) {
@@ -54,6 +55,15 @@
   if (G1SummarizeRSetStats) {
     _prev_period_summary.initialize(this);
   }
+  // Initialize the card queue set used to hold cards containing
+  // references into the collection set.
+  _into_cset_dirty_card_queue_set.initialize(NULL, // Should never be called by the Java code
+                                             DirtyCardQ_CBL_mon,
+                                             DirtyCardQ_FL_lock,
+                                             -1, // never trigger processing
+                                             -1, // no limit on length
+                                             Shared_DirtyCardQ_lock,
+                                             &JavaThread::dirty_card_queue_set());
 }
 
 G1RemSet::~G1RemSet() {
@@ -242,7 +252,7 @@
     if (_g1rs->refine_card(card_ptr, worker_i, true)) {
       // 'card_ptr' contains references that point into the collection
       // set. We need to record the card in the DCQS
-      // (G1CollectedHeap::into_cset_dirty_card_queue_set())
+      // (_into_cset_dirty_card_queue_set)
       // that's used for that purpose.
       //
       // Enqueue the card
@@ -286,7 +296,7 @@
   // are wholly 'free' of live objects. In the event of an evacuation
   // failure the cards/buffers in this queue set are passed to the
   // DirtyCardQueueSet that is used to manage RSet updates
-  DirtyCardQueue into_cset_dcq(&_g1->into_cset_dirty_card_queue_set());
+  DirtyCardQueue into_cset_dcq(&_into_cset_dirty_card_queue_set);
 
   updateRS(&into_cset_dcq, worker_i);
   size_t cards_scanned = scanRS(oc, heap_region_codeblobs, worker_i);
@@ -309,7 +319,7 @@
   // Set all cards back to clean.
   _g1->cleanUpCardTable();
 
-  DirtyCardQueueSet& into_cset_dcqs = _g1->into_cset_dirty_card_queue_set();
+  DirtyCardQueueSet& into_cset_dcqs = _into_cset_dirty_card_queue_set;
   int into_cset_n_buffers = into_cset_dcqs.completed_buffers_num();
 
   if (_g1->evacuation_failed()) {
@@ -325,10 +335,10 @@
 
   // Free any completed buffers in the DirtyCardQueueSet used to hold cards
   // which contain references that point into the collection.
-  _g1->into_cset_dirty_card_queue_set().clear();
-  assert(_g1->into_cset_dirty_card_queue_set().completed_buffers_num() == 0,
+  _into_cset_dirty_card_queue_set.clear();
+  assert(_into_cset_dirty_card_queue_set.completed_buffers_num() == 0,
          "all buffers should be freed");
-  _g1->into_cset_dirty_card_queue_set().clear_n_completed_buffers();
+  _into_cset_dirty_card_queue_set.clear_n_completed_buffers();
 }
 
 class ScrubRSClosure: public HeapRegionClosure {
@@ -586,9 +596,9 @@
     bool use_hot_card_cache = hot_card_cache->use_cache();
     hot_card_cache->set_use_cache(false);
 
-    DirtyCardQueue into_cset_dcq(&_g1->into_cset_dirty_card_queue_set());
+    DirtyCardQueue into_cset_dcq(&_into_cset_dirty_card_queue_set);
     updateRS(&into_cset_dcq, 0);
-    _g1->into_cset_dirty_card_queue_set().clear();
+    _into_cset_dirty_card_queue_set.clear();
 
     hot_card_cache->set_use_cache(use_hot_card_cache);
     assert(JavaThread::dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed");