[dpdk-dev] [PATCH v2] net/mlx5: disable ConnectX-4 Lx Multi Packet Send by default

[Yongseok Koh]

> On Aug 15, 2018, at 5:17 AM, Shahaf Shuler <shahafs at mellanox.com> wrote:
> 
> On ConnectX-4 Lx the Multi Packet Send (MPW) feature is considered
> un-secure, as on some cases were the application provides incorrect mbufs
> on the Tx burst the host or NIC can get stuck.
> 
> Hence, disabling the feature by default for this specific NIC.
> Users can still enable this feature and enjoy the performance gain
> (mostly for low number of cores) by using the txq_mpw_en devarg.
> 
> This patch will impact the out of the box performance of some application
> using ConnectX-4 Lx for the sack of security and robustness.
> 
> Since we need different defaults based on the underlying device the mpw
> field in the configuration struct was extended to contain also the
> MLX5_ARG_UNSET option.
> 
> Cc: stable at dpdk.org
> 
> Signed-off-by: Shahaf Shuler <shahafs at mellanox.com>
> ---

Acked-by: Yongseok Koh <yskoh at mellanox.com>
 
Thanks