diff -r 5c93c1f61226 -r 868d87ed63c8 src/share/vm/memory/filemap.cpp
--- a/src/share/vm/memory/filemap.cpp	Thu Apr 18 10:09:23 2013 -0700
+++ b/src/share/vm/memory/filemap.cpp	Tue Feb 12 14:15:45 2013 -0800
@@ -238,8 +238,8 @@
 
 void FileMapInfo::write_space(int i, Metaspace* space, bool read_only) {
   align_file_position();
-  size_t used = space->used_words(Metaspace::NonClassType) * BytesPerWord;
-  size_t capacity = space->capacity_words(Metaspace::NonClassType) * BytesPerWord;
+  size_t used = space->used_bytes_slow(Metaspace::NonClassType);
+  size_t capacity = space->capacity_bytes_slow(Metaspace::NonClassType);
   struct FileMapInfo::FileMapHeader::space_info* si = &_header._space[i];
   write_region(i, (char*)space->bottom(), used, capacity, read_only, false);
 }