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    SubjectRe: [PATCH 2.5.43-mm2] New shared page table patch
    > Actually, per-object reverse mappings are nowhere near as good
    > a solution as shared page tables. At least, not from the points
    > of view of space consumption and the overhead of tearing down
    > the mappings at pageout time.
    > Per-object reverse mappings are better for fork+exec+exit speed,
    > though.
    > It's a tradeoff: do we care more for a linear speedup of fork(),
    > exec() and exit() than we care about a possibly exponential
    > slowdown of the pageout code ?

    As long as the box doesn't fall flat on it's face in a jibbering
    heap, that's the first order of priority ... ie I don't care much
    for now ;-)


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