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Subject: Re: [RFC PATCH 0/2] PM / devfreq: Add delayed timer for polling
To:     Chanwoo Choi <cw00.choi@samsung.com>, k.konieczny@samsung.com,
        krzk@kernel.org, kgene@kernel.org
Cc:     s.nawrocki@samsung.com, willy.mh.wolff.ml@gmail.com,
        b.zolnierkie@samsung.com, chanwoo@kernel.org,
        myungjoo.ham@samsung.com, kyungmin.park@samsung.com,
        linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-samsung-soc@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org
References: <CGME20200703061508epcas1p171aa3c0ab832b77e5837d8bd1e563742@epcas1p1.samsung.com>
 <20200703062622.11773-1-cw00.choi@samsung.com>
From:   Lukasz Luba <lukasz.luba@arm.com>
Message-ID: <cea8d850-131f-6121-6d96-8b8dc2a33432@arm.com>
Date:   Wed, 8 Jul 2020 15:01:19 +0100
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Hi all,

On 7/3/20 7:26 AM, Chanwoo Choi wrote:
> Add the delayed timer to devfreq framework in order to support
> the periodical polling mode without stop caused by CPU idle state.
> Some Non-CPU device must need to monitor the device status like
> utilization regardless of CPU state.
> 
> - patch1 explains the detailed reason why the delayed timer is required.
> - patch2 initializes that exynos5422-dmc device use delayed timer as default
> instead of deferrable timer.
> 
> Chanwoo Choi (2):
>    PM / devfreq: Add support delayed timer for polling mode
>    memory: samsung: exynos5422-dmc: Use delayed timer as default
> 
>   Documentation/ABI/testing/sysfs-class-devfreq | 12 +++
>   drivers/devfreq/devfreq.c                     | 83 ++++++++++++++++++-
>   drivers/memory/samsung/exynos5422-dmc.c       |  1 +
>   include/linux/devfreq.h                       |  9 ++
>   4 files changed, 104 insertions(+), 1 deletion(-)
> 


My apologizes for being late for the party. I wasn't able to run tests
and I had to fix my setup after I messed up some scripts.

The patch set looks good to me, so you can add my (to both patches):

Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>

I have run these Willy's benchmark tests and I will send some
follow up patches in a few minutes.

Regards,
Lukasz