[PATCH 0/3] nvme-cli: NIC topology aware I/O queue scaling

[Nilay Shroff]

Hi,

This series is a rework of the earlier patchset[1]. The main
difference is that --nr-io-queues is now calculated in nvme-cli
instead of in the kernel when establishing an NVMe/TCP connection.

This rework is based on the feedback received[2] from the netdev
maintainers.

The original patchset determined the number of NVMe/TCP I/O queues
based on the number of online CPUs and the number of hardware queues
available on the NIC in kernel driver. This series moves that logic
to nvme-cli.

When --nr-io-queues is not explicitly specified, nvme-cli determines
the egress netdev for the NVMe/TCP connection, retrieves its current
hardware queue count, and calculates the default as:

	min(nr_hw_queues, num_online_cpus)

The remaining patches from the original series, which expose NVMe/TCP
queue and flow information through debugfs, are still useful for
subsequent CPU/NIC topology tuning. I will send those changes as a
separate patchset.

The two patchsets are independent and can be reviewed and merged
separately.

As usual, comments, feedback, and suggestions are most welcome!

Thanks!

[1] https://lore.kernel.org/all/20260731073918.614014-1-nilay@linux.ibm.com/
[2] https://lore.kernel.org/all/20260807160904.2eb1b3d1@kernel.org/

Nilay Shroff (3):
  shared/net-util-linux: add support for retrieving egress netdev
  shared/net-util-linux: add support for retrieving NIC h/w queues
  fabrics: determine --nr-io-queues when not explicitly specified

 shared/net-util-linux.c | 265 ++++++++++++++++++++++++++++++++++++++++
 shared/net-util.h       |  32 +++++
 src/fabrics.c           |  77 +++++++++++-
 3 files changed, 371 insertions(+), 3 deletions(-)

-- 
2.53.0