> There is a second method to address this. Pages can be swapped out
> of the page tables and still remain in the page cache, the virtual
> scan does this all of the time. This should allow for arbitrary
> amounts of sharing. There is some overhead, in faulting the pages
> back in but it is much better than cases that do not work. A simple
> implementation would have a maximum pte_chain length.
Indeed. We need this same thing for page tables too, otherwise
a high sharing situation can easily "require" more page table
memory than the total amount of physical memory in the system ;)
regards,
Rik
-- Bravely reimplemented by the knights who say "NIH".http://www.surriel.com/ http://distro.conectiva.com/
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