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    SubjectRe: [RFC PATCH v3 3/5] sched: nominate preferred wakeup cpu
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    On Tue, 2008-11-11 at 00:03 +0530, Vaidyanathan Srinivasan wrote:
    > When the system utilisation is low and more cpus are idle,
    > then the process waking up from sleep should prefer to
    > wakeup an idle cpu from semi-idle cpu package (multi core
    > package) rather than a completely idle cpu package which
    > would waste power.
    >
    > Use the sched_mc balance logic in find_busiest_group() to
    > nominate a preferred wakeup cpu.
    >
    > This info can be sored in appropriate sched_domain, but
    > updating this info in all copies of sched_domain is not
    > practical. For now lets try with a per-cpu variable
    > pointing to a common storage in partition sched domain
    > attribute. Global variable may not work in partitioned
    > sched domain case.

    Would it make sense to place the preferred_wakeup_cpu stuff in the
    root_domain structure we already have?



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