linux-kernel - Re: [PATCH 3/6] sched: Allow sched_{get,set}attr to change latency

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Message-ID: <CAKfTPtBwnLLFmbubqhp_Dn-vDJx-Ue3TQ9Q=tNb=m=yHqG+_Hg@mail.gmail.com>
Date:   Tue, 22 Mar 2022 15:55:23 +0100
From:   Vincent Guittot <vincent.guittot@...aro.org>
To:     Tim Chen <tim.c.chen@...ux.intel.com>
Cc:     mingo@...hat.com, peterz@...radead.org, juri.lelli@...hat.com,
        dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com,
        mgorman@...e.de, linux-kernel@...r.kernel.org, parth@...ux.ibm.com,
        qais.yousef@....com, chris.hyser@...cle.com,
        pkondeti@...eaurora.org, Valentin.Schneider@....com,
        patrick.bellasi@...bug.net, David.Laight@...lab.com,
        pjt@...gle.com, pavel@....cz, tj@...nel.org,
        dhaval.giani@...cle.com, qperret@...gle.com
Subject: Re: [PATCH 3/6] sched: Allow sched_{get,set}attr to change
 latency_nice of the task

On Tue, 22 Mar 2022 at 01:22, Tim Chen <tim.c.chen@...ux.intel.com> wrote:
>
> On Fri, 2022-03-11 at 17:14 +0100, Vincent Guittot wrote:
> >
> > +static void __setscheduler_latency(struct task_struct *p,
> > +             const struct sched_attr *attr)
> > +{
> > +     if (attr->sched_flags & SCHED_FLAG_LATENCY_NICE) {
> > +             p->latency_prio = NICE_TO_LATENCY(attr->sched_latency_nice);
>
> NICE_TO_LATENCY used here but has defined later in patch 5.  This will break
> bisect.

yes, I have done a mistake when reorganizing the patchset.
latency_prio replaces latency_nice in patch 5 so it should still be
latency_nice field here instead of latency_prio.
Will fix it.

>
> > +             set_latency_weight(p);
> > +     }
> >  }
> >
> >
>
> Tim
>