--- a/hotspot/src/share/vm/gc/cms/compactibleFreeListSpace.cpp	Fri Sep 04 17:33:56 2015 -0700
+++ b/hotspot/src/share/vm/gc/cms/compactibleFreeListSpace.cpp	Tue Aug 18 21:32:21 2015 +0200
@@ -2989,7 +2989,7 @@
   assert(task_size > CardTableModRefBS::card_size_in_words &&
          (task_size %  CardTableModRefBS::card_size_in_words == 0),
          "Otherwise arithmetic below would be incorrect");
-  MemRegion span = _gen->reserved();
+  MemRegion span = _old_gen->reserved();
   if (low != NULL) {
     if (span.contains(low)) {
       // Align low down to  a card boundary so that