linux-kernel - Re: [PATCH V10] powercap/drivers/idle_inject: Add an idle injection framework

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Message-ID: <20180626110105.qqsrslavtfxuubcm@vireshk-i7>
Date:   Tue, 26 Jun 2018 16:31:05 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:     rjw@...ysocki.net, linux-kernel@...r.kernel.org,
        Eduardo Valentin <edubezval@...il.com>,
        Javi Merino <javi.merino@...nel.org>,
        Leo Yan <leo.yan@...aro.org>,
        Kevin Wangtao <kevin.wangtao@...aro.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Rui Zhang <rui.zhang@...el.com>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Andrea Parri <andrea.parri@...rulasolutions.com>,
        "open list:POWER MANAGEMENT CORE" <linux-pm@...r.kernel.org>
Subject: Re: [PATCH V10] powercap/drivers/idle_inject: Add an idle injection
 framework

On 26-06-18, 12:53, Daniel Lezcano wrote:
> Initially, the cpu_cooling device for ARM was changed by adding a new
> policy inserting idle cycles. The intel_powerclamp driver does a
> similar action.
> 
> Instead of implementing idle injections privately in the cpu_cooling
> device, move the idle injection code in a dedicated framework and give
> the opportunity to other frameworks to make use of it.
> 
> The framework relies on the smpboot kthreads which handles via its
> main loop the common code for hotplugging and [un]parking.
> 
> This code was previously tested with the cpu cooling device and went
> through several iterations. It results now in split code and API
> exported in the header file. It was tested with the cpu cooling device
> with success.
> 
> Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
> Cc: Viresh Kumar <viresh.kumar@...aro.org>
> Cc: Eduardo Valentin <edubezval@...il.com>
> Cc: Javi Merino <javi.merino@...nel.org>
> Cc: Leo Yan <leo.yan@...aro.org>
> Cc: Kevin Wangtao <kevin.wangtao@...aro.org>
> Cc: Vincent Guittot <vincent.guittot@...aro.org>
> Cc: Rui Zhang <rui.zhang@...el.com>
> Cc: Daniel Thompson <daniel.thompson@...aro.org>
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Andrea Parri <andrea.parri@...rulasolutions.com>
> ---
> 
> V10:
>    - Remove set_freezable (Rafael J. Wysocki)
>    - Reduce the prefixed names 'injection' by 'inject" (Rafael J. Wysocki)
>    - Rename 'idle_injection_wakeup_fn()' to 'idle_inject_timer_fn()' (Rafael J. Wysocki)
>    - Shorten label 'out_rollback_per_cpu' to 'out_rollback' (Rafael J. Wysocki)

Reviewed-by: Viresh Kumar <viresh.kumar@...aro.org>

-- 
viresh