On Mon, 28 Jul 2025 15:33:55 -0700 Mina Almasry wrote:

quoted

From: Jakub Kicinski <kuba@kernel.org>

In normal operation only a subset of queues is configured for
zero-copy. Since zero-copy is the main use for larger buffer
sizes we need to configure the sizes per queue.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>  

I wonder if this is necessary for some reason, or is it better to
expect the driver to refer to the netdev->qcfgs directly?

By my count the configs can now live in 4 places: the core netdev
config, the core per-queue config, the driver netdev config, and the
driver per-queue config.

I honestly I'm not sure about duplicating settings between the netdev
configs and the per-queue configs in the first place (seems like
configs should be either driver wide or per-queue to me, and not
both), and I'm less sure about again duplicating the settings between
core structs and in-driver structs. Seems like the same information
duplicated in many places and a nightmare to keep it all in sync.

Does patch 20 answer this question?