linux-kernel - Re: [RFC PATCH v2 3/8] sched/cpufreq_schedutil: make worker kthread be SCHED

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Message-ID: <20171220125705.djemtgopmmthzqjz@hirez.programming.kicks-ass.net>
Date:   Wed, 20 Dec 2017 13:57:05 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Juri Lelli <juri.lelli@...hat.com>
Cc:     Patrick Bellasi <patrick.bellasi@....com>, mingo@...hat.com,
        rjw@...ysocki.net, viresh.kumar@...aro.org,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        tglx@...utronix.de, vincent.guittot@...aro.org,
        rostedt@...dmis.org, luca.abeni@...tannapisa.it,
        claudio@...dence.eu.com, tommaso.cucinotta@...tannapisa.it,
        bristot@...hat.com, mathieu.poirier@...aro.org, tkjos@...roid.com,
        joelaf@...gle.com, morten.rasmussen@....com,
        dietmar.eggemann@....com, alessio.balsini@....com,
        Juri Lelli <juri.lelli@....com>,
        Ingo Molnar <mingo@...nel.org>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>
Subject: Re: [RFC PATCH v2 3/8] sched/cpufreq_schedutil: make worker kthread
 be SCHED_DEADLINE

On Tue, Dec 05, 2017 at 01:34:00PM +0100, Juri Lelli wrote:
> > What about using for all these wrappers the same utility function you
> > already use in this source file? I.e.
> > 
> >         if (unlikely(dl_entity_is_special(dl_se)))
> >                 return;
> >         __add_rq_bw(dl_se->dl_bw, dl_rq);

> > > +static inline int dl_entity_is_special(struct sched_dl_entity *dl_se)
> > > +{
> > #ifdef CONFIG_CPU_FREQ_GOV_SCHEDUTIL
> > > +	return dl_se->flags & SCHED_FLAG_SUGOV;
> > #else
> >         return false;
> > #endif
> > > +}

Move the unlikely in here, saves on typing.