linux-kernel - Re: [PATCH net-next v12 00/13] Add support for PSE budget evaluation strategy

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Message-ID: <f5fb49b6-1007-4879-956d-cead2b0f1c86@nvidia.com>
Date: Mon, 9 Jun 2025 14:03:46 +0300
From: Gal Pressman <gal@...dia.com>
To: Kory Maincent <kory.maincent@...tlin.com>
Cc: Paolo Abeni <pabeni@...hat.com>, Andrew Lunn <andrew@...n.ch>,
 Oleksij Rempel <o.rempel@...gutronix.de>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Jonathan Corbet <corbet@....net>,
 Donald Hunter <donald.hunter@...il.com>, Rob Herring <robh@...nel.org>,
 Andrew Lunn <andrew+netdev@...n.ch>, Simon Horman <horms@...nel.org>,
 Heiner Kallweit <hkallweit1@...il.com>, Russell King
 <linux@...linux.org.uk>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Liam Girdwood <lgirdwood@...il.com>,
 Mark Brown <broonie@...nel.org>,
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>, netdev@...r.kernel.org,
 linux-doc@...r.kernel.org, Kyle Swenson <kyle.swenson@....tech>,
 Dent Project <dentproject@...uxfoundation.org>, kernel@...gutronix.de,
 Maxime Chevallier <maxime.chevallier@...tlin.com>,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH net-next v12 00/13] Add support for PSE budget evaluation
 strategy

On 09/06/2025 11:36, Kory Maincent wrote:
> Le Sun, 8 Jun 2025 09:17:59 +0300,
> Gal Pressman <gal@...dia.com> a écrit :
> 
>> On 28/05/2025 10:31, Paolo Abeni wrote:
>>> I'm sorry, even if this has been posted (just) before the merge window,
>>> I think an uAPI extension this late is a bit too dangerous, please
>>> repost when net-next will reopen after the merge window.  
>>
>> Are all new uapi changes expected to come with a test that exercises the
>> functionality?
> 
> I don't think so and I don't think it is doable for now on PSE. There is nothing
> that could get the PSE control of a dummy PSE controller driver. We need either
> the support for a dummy PHY driver similarly to netdevsim or the support for the
> MDI ports.
> By luck Maxime Chevallier is currently working on both of these tasks and had
> already sent several times the patch series for the MDI port support.
> 

We shouldn't rule it out so quickly, testing is important, let's try to
accommodate to our rules.

Why can't this be tested on real hardware using a drivers/net/hw
selftest? The test can skip if it lacks the needed hardware.
Or rebase this over Maxime's work?