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    SubjectRe: [PATCH 9/9] sched: Push down pre_schedule() and idle_balance()
    On Thu, Jan 30, 2014 at 01:45:07PM +0100, Vincent Guittot wrote:
    > On 28 January 2014 18:16, Peter Zijlstra <peterz@infradead.org> wrote:
    > > +idle:
    > > + idle_exit_fair(rq);
    >
    > It should be idle_enter_fair.
    >
    > we want to update the statistic with the running time of other classes
    > than CFS.
    >
    > The use case is:
    >
    > exit idle
    > put_prev_task_idle
    > --> idle_exit_fair (account elapsed idle time)
    > pick_next_task other than fair tasks
    > switch between "other than fair" tasks
    > ...
    > no more "other than fair" tasks to schedule
    > pick_next_task_fair
    > --> no fair task on the rq
    > --> jump to simple
    > --> idle_enter_fair (account elapsed running time of other class
    > before trying to pull fair task from other CPUs)
    > --> idle_balance()
    > ...

    Right.. terminal confusion on this topic it seems. Fixed it up.


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