linux-kernel - Re: [PATCH v3 4/5] sched/pelt: Add a new runnable average signal

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Date:   Fri, 21 Feb 2020 12:47:36 +0100
From:   Vincent Guittot <vincent.guittot@...aro.org>
To:     Dietmar Eggemann <dietmar.eggemann@....com>
Cc:     Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Phil Auld <pauld@...hat.com>, Parth Shah <parth@...ux.ibm.com>,
        Valentin Schneider <valentin.schneider@....com>,
        Hillf Danton <hdanton@...a.com>
Subject: Re: [PATCH v3 4/5] sched/pelt: Add a new runnable average signal

On Fri, 21 Feb 2020 at 10:45, Dietmar Eggemann <dietmar.eggemann@....com> wrote:
>
> On 19/02/2020 13:55, Vincent Guittot wrote:
>
> [...]
>
> > +static inline long se_runnable(struct sched_entity *se)
> > +{
>
> Why returning long here? sched_entity::runnable_weight is unsigned long
> but could be unsigned int (cfs_rq::h_nr_running is unsigned int).

I have reused the same prototype as for runnable_laod_avg

>
> ___update_load_sum() has 'unsigned long runnable' as parameter.