linux-kernel - Re: [PATCH v8 10/15] sched: Introduce a sysctl for Energy Aware Scheduling

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Date:   Tue, 16 Oct 2018 14:50:58 +0200
From:   Juri Lelli <juri.lelli@...hat.com>
To:     Quentin Perret <quentin.perret@....com>
Cc:     peterz@...radead.org, 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, edubezval@...il.com,
        srinivas.pandruvada@...ux.intel.com, currojerez@...eup.net,
        javi.merino@...nel.org
Subject: Re: [PATCH v8 10/15] sched: Introduce a sysctl for Energy Aware
 Scheduling

Hi,

On 16/10/18 11:15, Quentin Perret wrote:

[...]

> diff --git a/kernel/sysctl.c b/kernel/sysctl.c
> index cc02050fd0c4..481309a11174 100644
> --- a/kernel/sysctl.c
> +++ b/kernel/sysctl.c
> @@ -466,6 +466,17 @@ static struct ctl_table kern_table[] = {
>  		.extra1		= &one,
>  	},
>  #endif
> +#if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL)
> +	{
> +		.procname	= "sched_energy_aware",
> +		.data		= &sysctl_sched_energy_aware,
> +		.maxlen		= sizeof(unsigned int),
> +		.mode		= 0644,
> +		.proc_handler	= sched_energy_aware_handler,
> +		.extra1		= &zero,
> +		.extra2		= &one,
> +	},
> +#endif

Doesn't this need to be documented in Documentation/sysctl/kernel.txt?

Also, do we want a kernel parameter as well to be able to disable this
at boot?

Best,

- Juri