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Date: Mon, 4 May 2026 19:19:58 -0700
From: Jakub Kicinski <kuba@kernel.org>
To: Mark Bloch <mbloch@nvidia.com>
Cc: Tariq Toukan <tariqt@nvidia.com>, Eric Dumazet <edumazet@google.com>,
 Paolo Abeni <pabeni@redhat.com>, Andrew Lunn <andrew+netdev@lunn.ch>,
 "David S. Miller" <davem@davemloft.net>, Leon Romanovsky <leon@kernel.org>,
 Jason Gunthorpe <jgg@ziepe.ca>, Saeed Mahameed <saeedm@nvidia.com>, Shay
 Drory <shayd@nvidia.com>, Or Har-Toov <ohartoov@nvidia.com>, Edward Srouji
 <edwards@nvidia.com>, Maher Sanalla <msanalla@nvidia.com>, Simon Horman
 <horms@kernel.org>, Gerd Bayer <gbayer@linux.ibm.com>, Moshe Shemesh
 <moshe@nvidia.com>, Kees Cook <kees@kernel.org>, Patrisious Haddad
 <phaddad@nvidia.com>, Parav Pandit <parav@nvidia.com>, Carolina Jubran
 <cjubran@nvidia.com>, Cosmin Ratiu <cratiu@nvidia.com>,
 linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org,
 netdev@vger.kernel.org, Gal Pressman <gal@nvidia.com>, Dragos Tatulea
 <dtatulea@nvidia.com>
Subject: Re: [PATCH net-next V2 7/7] net/mlx5: Add profile to auto-enable
 switchdev mode at device init
Message-ID: <20260504191958.657cf439@kernel.org>
In-Reply-To: <9f73036e-32a8-4060-a347-cae05269b85f@nvidia.com>
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On Tue, 5 May 2026 05:00:15 +0300 Mark Bloch wrote:
> What I meant is that I am wary of putting too much policy into the kernel
> command line. A generic devlink level switchdev probe mode knob sounds
> reasonable to me if we keep the scope narrow. More complex policy, such as
> changing multiple defaults still seems better handled by userspace.
> 
> Would adding only switchdev/switchdev_inactive for now be acceptable?
> I will try to keep the code generic enough so it can be extended later if
> we want.

I wanted the format to be reasonably generic, but yes, just for making
future extensions possible. I don't expect us to add anything beyond 
the switchdev flag at this point. We don't have to implement the device
matching either. Just a comment in the code how we expect the full
format to look like would be enough, for whoever needs it in the future.