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    SubjectRe: Per-Processor Data Paget

    > clone()ing costs go up immediately, from the current 10 usecs cost to
    > create a process to 50-100 usecs, plus MM handling gets more complicated.
    > Plus in PAE mode this would be even more complicated (because two levels
    > need to be private to the thread). [...]

    plus a full TLB flush has to be done if we context-switch between threads
    that share the same address-space...

    -- mingo

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