Not at all impossible.
The kernelconfig is:
HIGMEM64G
and
HIGHMEM
Ubuntu Server is compiled with both these flags but not the desktop
version.
Using more than 4 GB ram has NOTHING to do with 32 vs 63 bit OS. Sure,
one process can use more than 4 GB ram but that is no big issue (yet).
** Changed in: ubuntu
Status: Invalid => Confirmed
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Generic 32 bit kernel should be compiled with 64 GB memory support
https://bugs.launchpad.net/bugs/116842
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