This is a note to let you know that I've just added the patch titled

net/mlx5e: Fix traffic being dropped on VF representor

to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: net-mlx5e-fix-traffic-being-dropped-on-vf-representor.patch and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Tue Apr 10 23:20:08 CEST 2018

From: Roi Dayan roid@mellanox.com Date: Wed, 28 Feb 2018 12:56:42 +0200 Subject: net/mlx5e: Fix traffic being dropped on VF representor

From: Roi Dayan roid@mellanox.com

[ Upstream commit 4246f698dd58e3c6246fa919ef0b0a1d29a57e4a ]

Increase representor netdev RQ size to avoid dropped packets. The current size (two) is just too small to keep up with conventional slow path traffic patterns. Also match the SQ size to the RQ size.

Fixes: cb67b832921c ("net/mlx5e: Introduce SRIOV VF representors") Signed-off-by: Roi Dayan roid@mellanox.com Reviewed-by: Paul Blakey paulb@mellanox.com Reviewed-by: Or Gerlitz ogerlitz@mellanox.com Signed-off-by: Saeed Mahameed saeedm@mellanox.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/mellanox/mlx5/core/en_rep.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c @@ -43,6 +43,11 @@ #include "en_tc.h" #include "fs_core.h"

+#define MLX5E_REP_PARAMS_LOG_SQ_SIZE \ + max(0x6, MLX5E_PARAMS_MINIMUM_LOG_SQ_SIZE) +#define MLX5E_REP_PARAMS_LOG_RQ_SIZE \ + max(0x6, MLX5E_PARAMS_MINIMUM_LOG_RQ_SIZE) + static const char mlx5e_rep_driver_name[] = "mlx5e_rep";

static void mlx5e_rep_get_drvinfo(struct net_device *dev, @@ -798,9 +803,9 @@ static void mlx5e_build_rep_params(struc MLX5_CQ_PERIOD_MODE_START_FROM_CQE : MLX5_CQ_PERIOD_MODE_START_FROM_EQE;

- params->log_sq_size = MLX5E_PARAMS_MINIMUM_LOG_SQ_SIZE; + params->log_sq_size = MLX5E_REP_PARAMS_LOG_SQ_SIZE; params->rq_wq_type = MLX5_WQ_TYPE_LINKED_LIST; - params->log_rq_size = MLX5E_PARAMS_MINIMUM_LOG_RQ_SIZE; + params->log_rq_size = MLX5E_REP_PARAMS_LOG_RQ_SIZE;

params->rx_am_enabled = MLX5_CAP_GEN(mdev, cq_moderation); mlx5e_set_rx_cq_mode_params(params, cq_period_mode);

Patches currently in stable-queue which might be from roid@mellanox.com are

queue-4.14/net-mlx5e-fix-memory-usage-issues-in-offloading-tc-flows.patch queue-4.14/net-mlx5e-fix-traffic-being-dropped-on-vf-representor.patch queue-4.14/net-mlx5e-sync-netdev-vxlan-ports-at-open.patch queue-4.14/net-mlx5e-don-t-override-vport-admin-link-state-in-switchdev-mode.patch