linux_dsm_epyc7002/drivers/net/ethernet/mellanox
Petr Machata 3a3539cd36 mlxsw: spectrum_buffers: Set up a dedicated pool for BUM traffic
MC-aware mode was recently enabled by mlxsw on Spectrum switches in
commit 7b81953066 ("mlxsw: spectrum: Configure MC-aware mode on mlxsw
ports"). Unfortunately, testing has shown that the fix is incomplete and
in the presented form actually makes the problem even worse, because any
amount of MC traffic causes UC disruption.

The reason for this is that currently, mlxsw configures the MC-specific
TCs (8..15) to map to pool 0. It also configures a maximum buffer size
of 0, but for MC traffic that maximum is disregarded and not part of the
quota. Therefore MC traffic is always admitted to the egress buffer.

Fix the configuration by directing the MC TCs into pool 15, which is
dedicated to MC traffic and recognized as such by the silicon.

Fixes: 7b81953066 ("mlxsw: spectrum: Configure MC-aware mode on mlxsw ports")
Signed-off-by: Petr Machata <petrm@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-05 07:55:43 -07:00
..
mlx4 net/mlx4/en_rx: Mark expected switch fall-throughs 2018-08-07 17:54:20 -07:00
mlx5/core net/mlx5: Fix SQ offset in QPs with small RQ 2018-09-04 12:17:33 -07:00
mlxfw net/mlxfw: Properly handle dependancy with non-loadable mlx5 2017-07-03 02:32:25 -07:00
mlxsw mlxsw: spectrum_buffers: Set up a dedicated pool for BUM traffic 2018-09-05 07:55:43 -07:00
Kconfig Change Kconfig description 2017-08-14 11:18:16 -07:00
Makefile Add the mlxfw module for Mellanox firmware flash process 2017-05-25 17:46:17 -04:00