Thread (7 messages) flat view 7 messages, 2 authors, 2026-05-14
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[PATCH net-next 0/5] net/mlx5e: improve RSS indirection table sizing and resizing

From: Tariq Toukan <tariqt@nvidia.com>
Date: 2026-05-11 17:28:08
Also in: linux-rdma, lkml

Hi,

This series by Yael improves mlx5e RSS indirection table handling around
channel count changes and large RSS configurations.

The series:
* removes the XOR8-specific channel count limitation,
* advertises the maximum supported RSS indirection table size,
* fixes resizing of non-default RSS contexts,
* allows resizing configured default RSS contexts during channel
  changes,
* and increases the default RSS spread factor from 2x to 4x to improve
  traffic distribution for large channel counts.

Together, these changes make RSS table sizing more flexible and robust,
while improving load balancing behavior on large systems.

Thanks,
Tariq

Yael Chemla (5):
  net/mlx5e: remove channel count limit for XOR8 RSS hash
  net/mlx5e: advertise max RSS indirection table size to ethtool
  net/mlx5e: resize non-default RSS indirection tables on channel change
  net/mlx5e: resize configured default RSS context table on channel
    change
  net/mlx5e: increase RSS indirection table spread factor

 .../net/ethernet/mellanox/mlx5/core/en/rqt.c  |   9 --
 .../net/ethernet/mellanox/mlx5/core/en/rqt.h  |   2 +-
 .../net/ethernet/mellanox/mlx5/core/en/rss.c  |  29 ++++-
 .../net/ethernet/mellanox/mlx5/core/en/rss.h  |   6 +-
 .../ethernet/mellanox/mlx5/core/en/rx_res.c   |  40 +++++--
 .../ethernet/mellanox/mlx5/core/en/rx_res.h   |   4 +-
 .../ethernet/mellanox/mlx5/core/en_ethtool.c  | 106 ++++++++----------
 .../net/ethernet/mellanox/mlx5/core/en_main.c |   9 +-
 8 files changed, 112 insertions(+), 93 deletions(-)


base-commit: 63751099502d10f0aa6bb35273e56c5800cc4e3a
-- 
2.44.0
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