linux-kernel - Re: [PATCH v2 1/10] cpufreq: Reduce cpufreq_update

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Message-ID: <20160310091901.GS6344@twins.programming.kicks-ass.net>
Date:	Thu, 10 Mar 2016 10:19:01 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:	"Rafael J. Wysocki" <rafael@...nel.org>,
	Linux PM list <linux-pm@...r.kernel.org>,
	Juri Lelli <juri.lelli@....com>,
	Steve Muckle <steve.muckle@...aro.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.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 v2 1/10] cpufreq: Reduce cpufreq_update_util() overhead a
 bit

On Wed, Mar 09, 2016 at 10:35:02PM +0100, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> Subject: [PATCH] cpufreq: Move scheduler-related code to the sched directory
> 
> Create cpufreq.c under kernel/sched/ and move the cpufreq code
> related to the scheduler to that file and to sched.h.
> 
> Redefine cpufreq_update_util() as a static inline function to avoid
> function calls at its call sites in the scheduler code (as suggested
> by Peter Zijlstra).
> 
> Also move the definition of struct update_util_data and declaration
> of cpufreq_set_update_util_data() from include/linux/cpufreq.h to
> include/linux/sched.h.
> 
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> ---
>  drivers/cpufreq/cpufreq.c          |   53 -------------------------------------
>  drivers/cpufreq/cpufreq_governor.c |    1 
>  include/linux/cpufreq.h            |   34 -----------------------
>  include/linux/sched.h              |    9 ++++++
>  kernel/sched/Makefile              |    1 
>  kernel/sched/cpufreq.c             |   37 +++++++++++++++++++++++++
>  kernel/sched/sched.h               |   49 +++++++++++++++++++++++++++++++++-
>  7 files changed, 96 insertions(+), 88 deletions(-)

Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>