> Hi
>
> Go to http://www.uspto.gov/patft/, search for patent number 5873127, and
> you will find the description of mapping page table entries into virtual
> memory via one page directory entry pointing to the page directory itself
> - exactly what FreeBSD does with PTDPTDI and APTDPTDI entries on i386.
> (including using alternate space as in get_ptbase() in i386/pmap.c to
> access page table entries of different processes).
It'd be hard to build a case on this patent, though; since it was granted
in 1996, and the technique is as old as the hills, proving prior art
would probably be relatively straightforward.
--
... every activity meets with opposition, everyone who acts has his
rivals and unfortunately opponents also. But not because people want
to be opponents, rather because the tasks and relationships force
people to take different points of view. [Dr. Fritz Todt]
V I C T O R Y N O T V E N G E A N C E
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