--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/gc/g1/g1HeterogeneousHeapPolicy.cpp	Fri Dec 21 08:18:59 2018 -0800
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "gc/g1/g1CollectedHeap.hpp"
+#include "gc/g1/g1HeterogeneousHeapPolicy.hpp"
+#include "gc/g1/g1Policy.hpp"
+#include "gc/g1/heterogeneousHeapRegionManager.hpp"
+
+G1HeterogeneousHeapPolicy::G1HeterogeneousHeapPolicy(G1CollectorPolicy* policy, STWGCTimer* gc_timer) :
+  G1Policy(policy, gc_timer), _manager(NULL) {}
+
+// We call the super class init(), after which we provision young_list_target_length() regions in dram.
+void G1HeterogeneousHeapPolicy::init(G1CollectedHeap* g1h, G1CollectionSet* collection_set) {
+  G1Policy::init(g1h, collection_set);
+  _manager = HeterogeneousHeapRegionManager::manager();
+  _manager->adjust_dram_regions((uint)young_list_target_length(), G1CollectedHeap::heap()->workers());
+}
+
+// After a collection pause, young list target length is updated. So we need to make sure we have enough regions in dram for young gen.
+void G1HeterogeneousHeapPolicy::record_collection_pause_end(double pause_time_ms, size_t cards_scanned, size_t heap_used_bytes_before_gc) {
+  G1Policy::record_collection_pause_end(pause_time_ms, cards_scanned, heap_used_bytes_before_gc);
+  _manager->adjust_dram_regions((uint)young_list_target_length(), G1CollectedHeap::heap()->workers());
+}
+
+// After a full collection, young list target length is updated. So we need to make sure we have enough regions in dram for young gen.
+void G1HeterogeneousHeapPolicy::record_full_collection_end() {
+  G1Policy::record_full_collection_end();
+  _manager->adjust_dram_regions((uint)young_list_target_length(), G1CollectedHeap::heap()->workers());
+}
+
+bool G1HeterogeneousHeapPolicy::force_upgrade_to_full() {
+  if (_manager->has_borrowed_regions()) {
+    return true;
+  }
+  return false;
+}