--- old/src/cpu/x86/vm/globals_x86.hpp	2010-10-04 17:00:07.679658698 -0400
+++ new/src/cpu/x86/vm/globals_x86.hpp	2010-10-04 17:00:06.080118526 -0400
@@ -63,3 +63,5 @@
 
 define_pd_global(bool, RewriteBytecodes,     true);
 define_pd_global(bool, RewriteFrequentPairs, true);
+
+define_pd_global(bool, UseMembar,            false);