linux-kernel - Re: [PATCH v6 03/11] sched/rt: add rt

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Date:   Thu, 21 Jun 2018 20:50:40 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Vincent Guittot <vincent.guittot@...aro.org>
Cc:     mingo@...nel.org, linux-kernel@...r.kernel.org, rjw@...ysocki.net,
        juri.lelli@...hat.com, dietmar.eggemann@....com,
        Morten.Rasmussen@....com, viresh.kumar@...aro.org,
        valentin.schneider@....com, patrick.bellasi@....com,
        joel@...lfernandes.org, daniel.lezcano@...aro.org,
        quentin.perret@....com, Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH v6 03/11] sched/rt: add rt_rq utilization tracking

On Fri, Jun 08, 2018 at 02:09:46PM +0200, Vincent Guittot wrote:
> +int update_rt_rq_load_avg(u64 now, struct rq *rq, int running)
> +{
> +	if (___update_load_sum(now, rq->cpu, &rq->avg_rt,
> +				running,
> +				running,
> +				running)) {

For code like this I wish C had grown named arguments for calls, just
like it has named initializers.

Something like:

	___update_load_sum(now, rq->cpu, &rq->avg_rt,
			   .load = running, .runnable = running,
			   .running = running)

would be so much easier to read... a well, maybe in another 30 years or
so.

> +		___update_load_avg(&rq->avg_rt, 1, 1);
> +		return 1;
> +	}
> +
> +	return 0;
> +}