[RFC PATCH 2/4] nvme-tcp: add a diagnostic message when NIC queues are underutilized

[Sagi Grimberg]

On 20/04/2026 14:49, Nilay Shroff wrote:
> Some systems may configure fewer NIC queues than supported by the
> hardware. When the number of NVMe-TCP I/O queues is limited by the
> number of active NIC queues, this can result in suboptimal performance.
>
> Add a diagnostic message to warn when the configured NIC queue count
> is lower than the maximum supported queue count, as reported by the
> driver. This may help users identify configurations where increasing
> the NIC queue count could improve performance.
>
> This change is informational only and does not modify NIC configuration.

I don't think that we want this at all. I don't think this is nvme-tcp place
to print such a log message at all. Especially not every time it connects
to a controller.

If you think you need to add this, create a userspace nvmf tool that
tests/validates a host.