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    SubjectRe: [PATCH 2.5.43-mm2] New shared page table patch
    >> For reference, one of the tests was TPC-H.  My code reduced the number of
    >> allocated pte_chains from 5 million to 50 thousand.
    > Don't tease, what did that do for performance? I see that someone has
    > already posted a possible problem, and the code would pass for complex for
    > most people, so is the gain worth the pain?

    In many cases, this will stop the box from falling over flat on it's
    face due to ZONE_NORMAL exhaustion (from pte-chains), or even total
    RAM exhaustion (from PTEs). Thus the performance gain is infinite ;-)


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