--- a/hotspot/src/share/vm/gc/shared/concurrentGCThread.cpp	Tue Feb 09 12:19:05 2016 +0100
+++ b/hotspot/src/share/vm/gc/shared/concurrentGCThread.cpp	Wed Feb 10 12:32:46 2016 +0000
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2016, 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
@@ -60,7 +60,7 @@
 void ConcurrentGCThread::wait_for_universe_init() {
   MutexLockerEx x(CGC_lock, Mutex::_no_safepoint_check_flag);
   while (!is_init_completed() && !_should_terminate) {
-    CGC_lock->wait(Mutex::_no_safepoint_check_flag, 200);
+    CGC_lock->wait(Mutex::_no_safepoint_check_flag, 1);
   }
 }
 

--- a/hotspot/src/share/vm/gc/shared/concurrentGCThread.hpp	Tue Feb 09 12:19:05 2016 +0100
+++ b/hotspot/src/share/vm/gc/shared/concurrentGCThread.hpp	Wed Feb 10 12:32:46 2016 +0000
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2016, 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
@@ -32,7 +32,7 @@
   friend class VMStructs;
 
 protected:
-  bool _should_terminate;
+  bool volatile _should_terminate;
   bool _has_terminated;
 
   // Create and start the thread (setting it's priority high.)

--- a/hotspot/src/share/vm/runtime/globals.hpp	Tue Feb 09 12:19:05 2016 +0100
+++ b/hotspot/src/share/vm/runtime/globals.hpp	Wed Feb 10 12:32:46 2016 +0000
@@ -2012,11 +2012,15 @@
           range(min_intx, 100)                                              \
                                                                             \
   product(uintx, InitiatingHeapOccupancyPercent, 45,                        \
-          "Percentage of the (entire) heap occupancy to start a "           \
-          "concurrent GC cycle. It is used by GCs that trigger a "          \
-          "concurrent GC cycle based on the occupancy of the entire heap, " \
-          "not just one of the generations (e.g., G1). A value of 0 "       \
-          "denotes 'do constant GC cycles'.")                               \
+          "The percent occupancy (IHOP) of the current old generation "     \
+          "capacity above which a concurrent mark cycle will be initiated " \
+          "Its value may change over time if adaptive IHOP is enabled, "    \
+          "otherwise the value remains constant. "                          \
+          "In the latter case a value of 0 will result as frequent as "     \
+          "possible concurrent marking cycles. A value of 100 disables "    \
+          "concurrent marking. "                                            \
+          "Fragmentation waste in the old generation is not considered "    \
+          "free space in this calculation. (G1 collector only)")            \
           range(0, 100)                                                     \
                                                                             \
   manageable(intx, CMSTriggerInterval, -1,                                  \

--- a/hotspot/src/share/vm/runtime/init.cpp	Tue Feb 09 12:19:05 2016 +0100
+++ b/hotspot/src/share/vm/runtime/init.cpp	Wed Feb 10 12:32:46 2016 +0000
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2016, 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
@@ -181,8 +181,7 @@
   }
 }
 
-
-static bool _init_completed = false;
+static volatile bool _init_completed = false;
 
 bool is_init_completed() {
   return _init_completed;