--- old/src/share/vm/gc/parallel/psCompactionManager.cpp	2016-04-06 17:17:30.062383734 +0200
+++ new/src/share/vm/gc/parallel/psCompactionManager.cpp	2016-04-06 17:17:29.962383733 +0200
@@ -54,7 +54,7 @@
 
 uint*                 ParCompactionManager::_recycled_stack_index = NULL;
 int                   ParCompactionManager::_recycled_top = -1;
-int                   ParCompactionManager::_recycled_bottom = -1;
+volatile int          ParCompactionManager::_recycled_bottom = -1;
 
 ParCompactionManager::ParCompactionManager() :
     _action(CopyAndUpdate),