linux-kernel - Re: [PATCH v9 09/15] sched: Introduce sched_energy

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Message-ID: <20181122102545.GQ2131@hirez.programming.kicks-ass.net>
Date:   Thu, 22 Nov 2018 11:25:45 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Quentin Perret <quentin.perret@....com>
Cc:     rjw@...ysocki.net, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, gregkh@...uxfoundation.org,
        mingo@...hat.com, dietmar.eggemann@....com,
        morten.rasmussen@....com, chris.redpath@....com,
        patrick.bellasi@....com, valentin.schneider@....com,
        vincent.guittot@...aro.org, thara.gopinath@...aro.org,
        viresh.kumar@...aro.org, tkjos@...gle.com, joel@...lfernandes.org,
        smuckle@...gle.com, adharmap@...eaurora.org,
        skannan@...eaurora.org, pkondeti@...eaurora.org,
        juri.lelli@...hat.com, edubezval@...il.com,
        srinivas.pandruvada@...ux.intel.com, currojerez@...eup.net,
        javi.merino@...nel.org
Subject: Re: [PATCH v9 09/15] sched: Introduce sched_energy_present static key

On Thu, Nov 22, 2018 at 09:32:39AM +0000, Quentin Perret wrote:
> Hmm, I went too fast, that's totally broken. But there's still something
> we can do with static_branch_{inc,dec} I think. I'll come back later
> with a better solution.

Right; if you count the rd's that have pd set, it should work-ish. Yes,
much cleaner if you can get it to work.