CONFIG_HIGHMEM on PPC

[David Edelsohn]

>>>>> Gabriel Paubert writes:

Gabriel> BATS are a good idea, but variable page size are another, superior IMHO,
Gabriel> possibility. It seems to be what Power4 has from what David said a few
Gabriel> days ago. I don't know how they mix variable page size with hash tables
Gabriel> and failed to find any detailed documentation...

	The variable page sizes are determined on a segment by segment
basis.  The segment type determines how to interpret the page table --
whether it maps 4KB or 16MB.

David

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