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    SubjectRe: [patch] SMP alternatives
    Mikulas Patocka wrote:
    >
    > Why should they waste their (already complex) decoding logic with that?
    > Why can't an application instead set a bit somewhere if it's running on
    > SMP and if it's threaded and branch to variants with and without lock
    > prefix?
    >

    Why? Because it would make the same code run faster on their CPU than
    on their competitor's. That's the kind of things that make x86 vendors
    smile.

    -hpa
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