--- a/hotspot/src/share/vm/runtime/globals.hpp	Tue Apr 26 12:14:22 2011 -0700
+++ b/hotspot/src/share/vm/runtime/globals.hpp	Wed Apr 27 15:40:36 2011 -0700
@@ -620,6 +620,9 @@
   product(bool, UseSSE42Intrinsics, false,                                  \
           "SSE4.2 versions of intrinsics")                                  \
                                                                             \
+  product(bool, UseCondCardMark, false,                                     \
+          "Check for already marked card before updating card table")       \
+                                                                            \
   develop(bool, TraceCallFixup, false,                                      \
           "traces all call fixups")                                         \
                                                                             \