> Date: Fri, 28 Feb 1997 16:32:48 +0100
> From: ws@kurt.tools.de (Wolfgang Solfrank)
> 
> > The routine is only called once during VM initialization, so the
> > result will be exactly the same either way.
> 
> pmap_free_pages is called twice during VM initialization.  Both times it is
> used to size some data structure depending on the amount of free space
> available.  Since after the first call the first data structure is allocated
> via pmap_steal_memory actually stealing some memory from the pool of pages,
> the second data structure is slightly oversized when using your code.
> 
> Hope it helps.
> 
> Ciao,
> Wolfgang

Oh!  I missed the second call.  You are quite right!

Thanks,
Gordon