--- a/hotspot/src/share/vm/runtime/arguments.cpp	Wed Mar 03 08:10:41 2010 -0800
+++ b/hotspot/src/share/vm/runtime/arguments.cpp	Wed Mar 03 14:48:26 2010 -0800
@@ -1346,9 +1346,7 @@
   }
 
   if (FLAG_IS_DEFAULT(MarkStackSize)) {
-    // Size as a multiple of TaskQueueSuper::N which is larger
-    // for 64-bit.
-    FLAG_SET_DEFAULT(MarkStackSize, 128 * TaskQueueSuper::total_size());
+    FLAG_SET_DEFAULT(MarkStackSize, 128 * TASKQUEUE_SIZE);
   }
   if (PrintGCDetails && Verbose) {
     tty->print_cr("MarkStackSize: %uk  MarkStackSizeMax: %uk",