RSS hash is only fully supported when the Hash RSS format is selected. Update MLX5 documentation about lack of RTE_MBUF_F_RX_RSS_HASH flag for some packets in case of any other CQE compression format is configured.
Signed-off-by: Alexander Kozyrev <akozy...@nvidia.com> --- doc/guides/nics/mlx5.rst | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/doc/guides/nics/mlx5.rst b/doc/guides/nics/mlx5.rst index 30c40f767b..ceea2dd320 100644 --- a/doc/guides/nics/mlx5.rst +++ b/doc/guides/nics/mlx5.rst @@ -497,9 +497,12 @@ Limitations cannot be used in conjunction with MPRQ since packets may be already attached to PMD-managed external buffers. -- If Multi-Packet Rx queue is configured (``mprq_en``) and Rx CQE compression is +- RSS hash result is only fully supported when the Hash RSS format is selected + as the current CQE compression format on the RX side (``rxq_cqe_comp_en``). + Any other format leads to no RTE_MBUF_F_RX_RSS_HASH flag for some Rx packets. + If a Multi-Packet Rx queue is configured (``mprq_en``) and Rx CQE compression is enabled (``rxq_cqe_comp_en``) at the same time, RSS hash result is not fully - supported. Some Rx packets may not have RTE_MBUF_F_RX_RSS_HASH. + supported, as the Checksum format is selected by default in this case. - IPv6 Multicast messages are not supported on VM, while promiscuous mode and allmulticast mode are both set to off. -- 2.43.5
