linux-kernel - Re: [PATCH net] i40e: Prevent unwanted interface name changes

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Message-ID: <20250822072326.725475ef@kernel.org>
Date: Fri, 22 Aug 2025 07:23:26 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Calvin Owens <calvin@...nvd.org>
Cc: Przemek Kitszel <przemyslaw.kitszel@...el.com>, Michal Schmidt
 <mschmidt@...hat.com>, netdev@...r.kernel.org, Tony Nguyen
 <anthony.l.nguyen@...el.com>, Andrew Lunn <andrew+netdev@...n.ch>, "David
 S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Paolo
 Abeni <pabeni@...hat.com>, Jedrzej Jagielski <jedrzej.jagielski@...el.com>,
 Ivan Vecera <ivecera@...hat.com>, intel-wired-lan@...ts.osuosl.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] i40e: Prevent unwanted interface name changes

On Thu, 21 Aug 2025 21:23:20 -0700 Calvin Owens wrote:
> > > If you actually have data on that, obviously that's different. But it
> > > sounds like you're guessing just like I am.  
> > 
> > I could only guess about other OS Vendors, one could check it also
> > for Ubuntu in their public git, but I don't think we need more data, as
> > ultimate judge here are Stable Maintainers  
> 
> Maybe I'm barking up the wrong tree, it's udev after all that decides to
> read the thing in /sys and name the interfaces differently because it's
> there...

Yeah, that's my feeling. Ideally there should be a systemd-networkd
setting that let's user opt out of adding the phys_port_name on
interfaces. 99% of users will not benefit from these, new drivers or
old. We're kinda making everyone suffer for the 1% :(