--- a/hotspot/src/share/vm/prims/whitebox.cpp	Mon Jun 10 11:30:51 2013 +0200
+++ b/hotspot/src/share/vm/prims/whitebox.cpp	Thu Jun 13 11:16:38 2013 -0700
@@ -159,7 +159,7 @@
 
 
 WB_ENTRY(void, WB_NMTCommitMemory(JNIEnv* env, jobject o, jlong addr, jlong size))
-  os::commit_memory((char *)(uintptr_t)addr, size);
+  os::commit_memory((char *)(uintptr_t)addr, size, !ExecMem);
   MemTracker::record_virtual_memory_type((address)(uintptr_t)addr, mtTest);
 WB_END