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Commit e4b85508 authored by Saeed Mahameed's avatar Saeed Mahameed Committed by David S. Miller
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net/mlx5e: Slightly reduce hardware LRO size 



Before this patch LRO size was 64K, now with build_skb requires
extra room, headroom + sizeof(skb_shared_info) added to the data
buffer will make  wqe size or page_frag_size slightly larger than
64K which will demand order 5 page instead of order 4 in 4K page systems.

We take those extra bytes from hardware LRO data size in order to not
increase the required page order for when hardware LRO is enabled.

Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
Signed-off-by: default avatarTariq Toukan <tariqt@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 21c59685

drivers/net/ethernet/mellanox/mlx5/core/en_main.c

+5 −2
Original line number Diff line number Diff line
@@ -3188,7 +3188,10 @@ static void mlx5e_build_nic_netdev_priv(struct mlx5_core_dev *mdev, 
				      MLX5E_INDIR_RQT_SIZE, profile->max_nch(mdev));



	priv->params.lro_wqe_sz =

		MLX5E_PARAMS_DEFAULT_LRO_WQE_SZ;

		MLX5E_PARAMS_DEFAULT_LRO_WQE_SZ -

		/* Extra room needed for build_skb */

		MLX5_RX_HEADROOM -

		SKB_DATA_ALIGN(sizeof(struct skb_shared_info));



	/* Initialize pflags */

	MLX5E_SET_PRIV_FLAG(priv, MLX5E_PFLAG_RX_CQE_BASED_MODER,