linux-kernel - Re: [PATCH v1] thermal: Introduce a debugfs-based testing facility

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Message-ID: <CAJZ5v0i2C2jbYeg=pTOTOwMFh+G4vkYn3tG5TzN+=r-7AYXLAA@mail.gmail.com>
Date: Mon, 19 Aug 2024 15:49:53 +0200
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc: Linux PM <linux-pm@...r.kernel.org>, Lukasz Luba <lukasz.luba@....com>, 
	LKML <linux-kernel@...r.kernel.org>, Daniel Lezcano <daniel.lezcano@...aro.org>
Subject: Re: [PATCH v1] thermal: Introduce a debugfs-based testing facility

On Fri, Aug 2, 2024 at 8:05 PM Rafael J. Wysocki <rjw@...ysocki.net> wrote:
>
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
>
> Introduce a facility allowing the thermal core functionality to be
> exercised in a controlled way in order to verify its behavior, without
> affecting its regular users noticeably.
>
> It is based on the idea of preparing thermal zone templates along with
> their trip points by writing to files in debugfs.  When ready, those
> templates can be used for registering test thermal zones with the
> thermal core.
>
> The temperature of a test thermal zone created this way can be adjusted
> via debugfs, which also triggers a __thermal_zone_device_update() call
> for it.  By manipulating the temperature of a test thermal zone, one can
> check if the thermal core reacts to the changes of it as expected.
>
> Concise "howto" documentation is included in one of the source files.
>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> ---
>
> In its current form, this is quite limited, but still quite useful at
> least for me.  In the future, it can be extended to allow "mock" test
> cooling devices to be registered and bound to trip points in "mock"
> test thermal zones, so that governor response can be tested at least
> in some scenarios.  On top of that, a test scripts can be developed
> for automated testing of the thermal core.  IOW, it's just a start.

Due to the lack of comments for the last 2 weeks I gather that this is
not controversial.

Since I want it in, I'll go ahead and put it into my linux-next
branch, but if there are any comments still, please let me know.