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From: Peter Zijlstra <peterz@infradead.org>
To: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>,
	Douglas RAILLARD <douglas.raillard@arm.com>,
	linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
	viresh.kumar@linaro.org, mingo@redhat.com
Subject: Re: [PATCH] sched/cpufreq: Align trace event behavior of fast switching
Date: Mon, 26 Aug 2019 13:24:06 +0200	[thread overview]
Message-ID: <20190826112406.GR2369@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <cb75ae16-727e-636b-2b79-4f049259c0aa@arm.com>

On Mon, Aug 26, 2019 at 11:51:17AM +0200, Dietmar Eggemann wrote:

> Not sure about the extra  'if trace_cpu_frequency_enabled()' but I guess
> it doesn't hurt.

Without that you do that for_each_cpu() iteration unconditionally, even
if the tracepoint is disabled.

  reply	other threads:[~2019-08-26 11:24 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-07 15:33 [PATCH] sched/cpufreq: Align trace event behavior of fast switching Douglas RAILLARD
2019-08-07 20:40 ` Rafael J. Wysocki
2019-08-08 16:18   ` Douglas Raillard
2019-08-26  9:10 ` Rafael J. Wysocki
2019-08-26  9:40   ` Peter Zijlstra
2019-08-26  9:51     ` Dietmar Eggemann
2019-08-26 11:24       ` Peter Zijlstra [this message]
2019-08-26 12:12         ` Dietmar Eggemann
2019-08-28  9:44     ` Rafael J. Wysocki

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