diff -r 5788dbd1f2d6 -r 33e421924c67 src/share/vm/prims/whitebox.cpp
--- a/src/share/vm/prims/whitebox.cpp	Fri Jan 16 10:29:12 2015 +0100
+++ b/src/share/vm/prims/whitebox.cpp	Tue Apr 07 10:53:51 2015 +0200
@@ -77,6 +77,10 @@
   return os::vm_page_size();
 WB_END
 
+WB_ENTRY(jlong, WB_GetVMLargePageSize(JNIEnv* env, jobject o))
+  return os::large_page_size();
+WB_END
+
 class WBIsKlassAliveClosure : public KlassClosure {
     Symbol* _name;
     bool _found;
@@ -976,6 +980,7 @@
   {CC"isObjectInOldGen",   CC"(Ljava/lang/Object;)Z", (void*)&WB_isObjectInOldGen  },
   {CC"getHeapOopSize",     CC"()I",                   (void*)&WB_GetHeapOopSize    },
   {CC"getVMPageSize",      CC"()I",                   (void*)&WB_GetVMPageSize     },
+  {CC"getVMLargePageSize", CC"()J",                   (void*)&WB_GetVMLargePageSize},
   {CC"isClassAlive0",      CC"(Ljava/lang/String;)Z", (void*)&WB_IsClassAlive      },
   {CC"classKnownToNotExist",
                            CC"(Ljava/lang/ClassLoader;Ljava/lang/String;)Z",(void*)&WB_ClassKnownToNotExist},