Errors I encountered in current coding:

void Metaspace::global_initialize()
...
  // Make the first class chunk bigger than a medium chunk so it's not put
  // on the medium chunk list.   The next chunk will be small and progress
  // from there.  This size calculated by -version.
  _first_class_chunk_word_size = MIN2((size_t)MediumChunk*6,
                                     (CompressedClassSpaceSize/BytesPerWord)*2);

this makes no sense. CompressedClassSpaceSize/BytesPerWord*2 would be larger than the address space for compressed class space,
but it never fires since (size_t)MediumChunk*6 is always smaller.

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