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    SubjectRe: [PATCH 2/3] sched: enforce per-cpu utilization limits on runtime balancing
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    On Tue, 2010-02-23 at 19:56 +0100, Fabio Checconi wrote:
    > + /*
    > + * Make sure that before restarting balancing everyone
    > + * sees the new free bandwidth.
    > + */
    > + smp_wmb();

    You cannot order something on its own, barriers come in pairs, where is
    his?



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