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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. Link: https://lore.kernel.org/r/20200527055014.355093-1-leon@kernel.org Signed-off-by: Mark Zhang <markz@mellanox.com> Reviewed-by: Maor Gottlieb <maorg@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.