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    SubjectRe: [PATCH] use for_each_cpu
    Anton Blanchard <> wrote:
    > > > The per cpu schedule counters need to be summed up over all possible cpus.
    > > > When testing hotplug cpu remove I saw the sum of the online cpu count
    > > > for nr_uninterruptible go negative which made the load average go nuts.
    > >
    > > I think the preferred approach here is to transfer the count over to the
    > > current CPU in the CPU_DEAD handler.
    > They only look to be called out of proc, and once every 5 seconds for
    > loadaverage calculations.


    > Is it worth adding complexity to the cpu
    > notifiers vs just using for_each_cpu?

    yup ;) It's only six lines, and it follows the same pattern as is used in,
    say, page_alloc_cpu_notify(). Doing the same thing the same way in
    multiple places is to be preferred, yes?
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