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    Subject[tip:sched/core] sched: Remove frequency scaling from cpu_capacity
    Commit-ID:  a8faa8f55d48496f64d96df48298e54fd380f6af
    Gitweb: http://git.kernel.org/tip/a8faa8f55d48496f64d96df48298e54fd380f6af
    Author: Vincent Guittot <vincent.guittot@linaro.org>
    AuthorDate: Fri, 27 Feb 2015 16:54:06 +0100
    Committer: Ingo Molnar <mingo@kernel.org>
    CommitDate: Fri, 27 Mar 2015 09:35:59 +0100

    sched: Remove frequency scaling from cpu_capacity

    Now that arch_scale_cpu_capacity has been introduced to scale the original
    capacity, the arch_scale_freq_capacity is no longer used (it was
    previously used by ARM arch).

    Remove arch_scale_freq_capacity from the computation of cpu_capacity.
    The frequency invariance will be handled in the load tracking and not in
    the CPU capacity. arch_scale_freq_capacity will be revisited for scaling
    load with the current frequency of the CPUs in a later patch.

    Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
    Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
    Acked-by: Morten Rasmussen <morten.rasmussen@arm.com>
    Cc: Morten.Rasmussen@arm.com
    Cc: dietmar.eggemann@arm.com
    Cc: efault@gmx.de
    Cc: kamalesh@linux.vnet.ibm.com
    Cc: linaro-kernel@lists.linaro.org
    Cc: nicolas.pitre@linaro.org
    Cc: preeti@linux.vnet.ibm.com
    Cc: riel@redhat.com
    Link: http://lkml.kernel.org/r/1425052454-25797-4-git-send-email-vincent.guittot@linaro.org
    Signed-off-by: Ingo Molnar <mingo@kernel.org>
    ---
    kernel/sched/fair.c | 7 -------
    1 file changed, 7 deletions(-)

    diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
    index d94a865..e54231f 100644
    --- a/kernel/sched/fair.c
    +++ b/kernel/sched/fair.c
    @@ -6042,13 +6042,6 @@ static void update_cpu_capacity(struct sched_domain *sd, int cpu)

    sdg->sgc->capacity_orig = capacity;

    - if (sched_feat(ARCH_CAPACITY))
    - capacity *= arch_scale_freq_capacity(sd, cpu);
    - else
    - capacity *= default_scale_capacity(sd, cpu);
    -
    - capacity >>= SCHED_CAPACITY_SHIFT;
    -
    capacity *= scale_rt_capacity(cpu);
    capacity >>= SCHED_CAPACITY_SHIFT;


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