diff -r 86be56b9ba46 -r fc9ed50498fb hotspot/src/share/vm/runtime/os.hpp
--- a/hotspot/src/share/vm/runtime/os.hpp	Tue Dec 09 09:55:39 2008 -0500
+++ b/hotspot/src/share/vm/runtime/os.hpp	Wed Dec 10 15:14:29 2008 -0800
@@ -208,7 +208,7 @@
 
   enum ProtType { MEM_PROT_NONE, MEM_PROT_READ, MEM_PROT_RW, MEM_PROT_RWX };
   static bool   protect_memory(char* addr, size_t bytes, ProtType prot,
-                               bool is_committed = false);
+                               bool is_committed = true);
 
   static bool   guard_memory(char* addr, size_t bytes);
   static bool   unguard_memory(char* addr, size_t bytes);