linux-kernel - Re: [PATCH v7 03/15] sched/core: uclamp: Add system default clamps

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Message-ID: <20190313201821.GW2482@worktop.programming.kicks-ass.net>
Date:   Wed, 13 Mar 2019 21:18:21 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Patrick Bellasi <patrick.bellasi@....com>
Cc:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-api@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        Tejun Heo <tj@...nel.org>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Paul Turner <pjt@...gle.com>,
        Quentin Perret <quentin.perret@....com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Morten Rasmussen <morten.rasmussen@....com>,
        Juri Lelli <juri.lelli@...hat.com>,
        Todd Kjos <tkjos@...gle.com>,
        Joel Fernandes <joelaf@...gle.com>,
        Steve Muckle <smuckle@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>
Subject: Re: [PATCH v7 03/15] sched/core: uclamp: Add system default clamps

On Fri, Feb 08, 2019 at 10:05:42AM +0000, Patrick Bellasi wrote:
> +static void uclamp_fork(struct task_struct *p)
> +{
> +	unsigned int clamp_id;
> +
> +	if (unlikely(!p->sched_class->uclamp_enabled))
> +		return;
> +
> +	for (clamp_id = 0; clamp_id < UCLAMP_CNT; ++clamp_id)
> +		p->uclamp[clamp_id].active = false;
> +}

Because in that case .active == false, and copy_process() will have done
thr right thing?