--- old/share/gc/parallel/psVirtualspace.hpp	2018-06-15 09:47:39.650912488 -0700
+++ new/share/gc/parallel/psVirtualspace.hpp	2018-06-15 09:47:39.586912486 -0700
@@ -91,6 +91,10 @@
   virtual size_t expand_into(PSVirtualSpace* space, size_t bytes);
   void           release();
 
+  // NVDIMM versions to manage expansion/shrinking
+  bool   expand_by(size_t bytes, int fd);
+  size_t expand_into(PSVirtualSpace* space, size_t bytes, int fd);
+
 #ifndef PRODUCT
   // Debugging
   static  bool is_aligned(size_t val, size_t align);