linux-kernel - Re: [PATCH v5 6/7][Update] cpufreq: Support for fast frequency switching

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Date:	Thu, 17 Mar 2016 11:35:07 +0000
From:	Juri Lelli <juri.lelli@....com>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:	Linux PM list <linux-pm@...r.kernel.org>,
	Steve Muckle <steve.muckle@...aro.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Michael Turquette <mturquette@...libre.com>,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH v5 6/7][Update] cpufreq: Support for fast frequency
 switching

Hi,

On 17/03/16 00:51, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> Subject: [PATCH] cpufreq: Support for fast frequency switching
> 

[...]

> +void cpufreq_enable_fast_switch(struct cpufreq_policy *policy)
> +{
> +	lockdep_assert_held(&policy->rwsem);
> +
> +	mutex_lock(&cpufreq_fast_switch_lock);
> +	if (policy->fast_switch_possible && cpufreq_fast_switch_count >= 0) {
> +		cpufreq_fast_switch_count++;
> +		policy->fast_switch_enabled = true;
> +	} else {
> +		pr_warn("cpufreq: CPU%u: Fast freqnency switching not enabled\n",

Ultra-minor nit: s/freqnency/frequency/

Also, is this really a warning or just a debug message? (everything
seems to work fine on Juno even if this is printed :-)).

Best,

- Juri