--- old/src/share/vm/gc/parallel/psCompactionManager.hpp	2016-04-06 17:17:30.582383740 +0200
+++ new/src/share/vm/gc/parallel/psCompactionManager.hpp	2016-04-06 17:17:30.478383739 +0200
@@ -103,7 +103,7 @@
   static int                      _recycled_top;
   // The index into _recycled_stack_index of the last region stack index
   // popped.  If -1, there has not been any entry popped.
-  static int                      _recycled_bottom;
+  static volatile int             _recycled_bottom;
 
   static ParMarkBitMap* _mark_bitmap;