When will we have the larger swap partition than 2GB?

According to the online manual of "mkswap":
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MKSWAP(8)           Linux Programmer's Manual           MKSWAP(8)

NAME
       mkswap - set up a Linux swap area
       [...omit...]
                           In the new style  swap  area  this  is
       precisely what is done.  The maximum useful size of a swap
       area now depends on the architecture.  It is roughly  2GB
       on  i386,  PPC,  m68k, ARM, 1GB on sparc, 512MB on mips,
       128GB on alpha and 3TB on sparc64.
       [...omit...]
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 The ARPHA can have 128GB and the SPARC64 can have 3TB for 
a single swap area or the swap file, why the IA-64 still have 
to be restricted to 2GB in the size ?
 The mkswap command on IA-64 RedHat measures the file size
in 32bit. Is there any hidden option that mkswap can create
the larger swap area/file ?

H.M.