diff -r c81fa70144aa -r 34fb2662f6c2 src/share/vm/gc_interface/collectedHeap.cpp
--- a/src/share/vm/gc_interface/collectedHeap.cpp	Mon Jan 25 18:03:29 2010 -0500
+++ b/src/share/vm/gc_interface/collectedHeap.cpp	Tue Jan 26 16:52:29 2010 -0800
@@ -66,7 +66,8 @@
   // Used for ReduceInitialCardMarks (when COMPILER2 is used);
   // otherwise remains unused.
 #ifdef COMPLER2
-  _defer_initial_card_mark = ReduceInitialCardMarks && (DeferInitialCardMark || card_mark_must_follow_store());
+  _defer_initial_card_mark =    ReduceInitialCardMarks && can_elide_tlab_store_barriers()
+                             && (DeferInitialCardMark || card_mark_must_follow_store());
 #else
   assert(_defer_initial_card_mark == false, "Who would set it?");
 #endif