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    SubjectRe: [RFC] scheduler: improve SMP fairness in CFS
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    Tong Li <tong.n.li@intel.com> writes:
    > +
    > + read_lock_irqsave(&dwrr_highest_lock, flags);

    That lock looks like it would bounce between CPUs like crazy.
    Did you try any benchmarks on a larger system?

    -Andi
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