--- xen/Rules.mk.noop	2006-07-26 17:44:02.000000000 -0400
+++ xen/Rules.mk	2006-07-26 17:44:16.000000000 -0400
@@ -52,7 +52,7 @@
 ALL_OBJS-$(ACM_SECURITY) += $(BASEDIR)/acm/built_in.o
 ALL_OBJS-y               += $(BASEDIR)/arch/$(TARGET_ARCH)/built_in.o
 
-CFLAGS-y               += -g -D__XEN__
+CFLAGS-y               += -g -D__XEN__ -O2
 CFLAGS-$(ACM_SECURITY) += -DACM_SECURITY
 CFLAGS-$(verbose)      += -DVERBOSE
 CFLAGS-$(crash_debug)  += -DCRASH_DEBUG