netdev - Re: [REGRESSION]: mlx5_core does not autoload in Linux 6.18

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Message-ID: <418484c3-e65b-414d-ad2c-71e832ae7af2@leemhuis.info>
Date: Thu, 4 Dec 2025 12:53:06 +0100
From: Thorsten Leemhuis <regressions@...mhuis.info>
To: Saeed Mahameed <saeedm@...dia.com>, Tariq Toukan <tariqt@...dia.com>,
 Mark Bloch <mbloch@...dia.com>, netdev <netdev@...r.kernel.org>
Cc: regressions@...ts.linux.dev, Demi Marie Obenour <demiobenour@...il.com>
Subject: Re: [REGRESSION]: mlx5_core does not autoload in Linux 6.18

Lo! Thx for the report.

Let me CC the maintainers of said driver, maybe they have an idea or
even head about the problem already. If not, you might need to bisect this.

On 12/4/25 08:54, Demi Marie Obenour wrote:
> In Linux 6.18, mlx5_core does not load automatically.  This causes
> my server to not be accessible from the network.  Manually loading
> the module in the initramfs fixes the problem.  Everything worked
> with Linux 6.17.x.
> 
> I'm using the linuxPackages_latest package from Nixpkgs.

Mentioning it like that might scare kernel developers, as they have no
idea what this is and thus might suspect that it's a vendor kernel with
lots of patches applied. Is that the case? Or is that vanilla or at
least close to vanilla?

>  The server is a RISE-7 OVH dedicated server with an AMD Epyc 7402 CPU.

Ciao, Thorsten

#regzbot ^introduced: v6.17..v6.18
#regzbot title: net: mlx5_core: module does not autoload anymore Linux 6.18