diff -r 910fc72c03e8 -r edefffab74e2 hotspot/src/share/vm/runtime/globals.hpp
--- a/hotspot/src/share/vm/runtime/globals.hpp	Mon Apr 24 09:14:09 2017 +0200
+++ b/hotspot/src/share/vm/runtime/globals.hpp	Wed Jul 05 11:33:17 2017 +0200
@@ -25,11 +25,23 @@
 #ifndef SHARE_VM_RUNTIME_GLOBALS_HPP
 #define SHARE_VM_RUNTIME_GLOBALS_HPP
 
+#include "utilities/align.hpp"
 #include "utilities/globalDefinitions.hpp"
 #include "utilities/macros.hpp"
 
 #include <float.h> // for DBL_MAX
 
+// The larger HeapWordSize for 64bit requires larger heaps
+// for the same application running in 64bit.  See bug 4967770.
+// The minimum alignment to a heap word size is done.  Other
+// parts of the memory system may require additional alignment
+// and are responsible for those alignments.
+#ifdef _LP64
+#define ScaleForWordSize(x) align_down_((x) * 13 / 10, HeapWordSize)
+#else
+#define ScaleForWordSize(x) (x)
+#endif
+
 // use this for flags that are true per default in the tiered build
 // but false in non-tiered builds, and vice versa
 #ifdef TIERED