Re: [PATCH rdma-next v1] RDMA/mlx5: Support TX port affinity for VF drivers in LAG mode

[Jason Gunthorpe <jgg@ziepe.ca>]

On Wed, May 27, 2020 at 08:50:14AM +0300, Leon Romanovsky wrote:
> From: Mark Zhang <markz@mellanox.com>
> 
> The mlx5 VF driver doesn't set QP tx port affinity because it doesn't
> know if the lag is active or not, since the "lag_active" works only for
> PF interfaces. In this case for VF interfaces only one lag is used
> which brings performance issue.
> 
> Add a lag_tx_port_affinity CAP bit; When it is enabled and
> "num_lag_ports > 1", then driver always set QP tx affinity, regardless
> of lag state.
> 
> Signed-off-by: Mark Zhang <markz@mellanox.com>
> Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
> Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
> ---
> Changelog
> v1:
>  * Fixed wrong check of num_lag_ports.
> v0: https://lore.kernel.org/linux-rdma/20200526143457.218840-1-leon@kernel.org
> ---
>  drivers/infiniband/hw/mlx5/main.c    | 2 +-
>  drivers/infiniband/hw/mlx5/mlx5_ib.h | 7 +++++++
>  drivers/infiniband/hw/mlx5/qp.c      | 3 ++-
>  3 files changed, 10 insertions(+), 2 deletions(-)

Applied to for-next thanks

Jason