Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 27055454 authored by Alaa Hleihel's avatar Alaa Hleihel Committed by David S. Miller
Browse files

net/mlx4_en: Use minimal rx and tx ring sizes on kdump kernel 



When memory is limited (on kdump kernel), reduce size of rx and tx rings.
Also reduce the number of rx rings.

Signed-off-by: default avatarAlaa Hleihel <alaa@mellanox.com>
Signed-off-by: default avatarTariq Toukan <tariqt@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 071a234a

drivers/net/ethernet/mellanox/mlx4/en_main.c

+7 −2
Original line number Diff line number Diff line
@@ -167,8 +167,13 @@ static void mlx4_en_get_profile(struct mlx4_en_dev *mdev) 
		params->prof[i].rx_ppp = pfcrx;

		params->prof[i].tx_pause = !(pfcrx || pfctx);

		params->prof[i].tx_ppp = pfctx;

		if (mlx4_low_memory_profile()) {

			params->prof[i].tx_ring_size = MLX4_EN_MIN_TX_SIZE;

			params->prof[i].rx_ring_size = MLX4_EN_MIN_RX_SIZE;

		} else {

			params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;

			params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;

		}

		params->prof[i].num_up = MLX4_EN_NUM_UP_LOW;

		params->prof[i].num_tx_rings_p_up = params->max_num_tx_rings_p_up;

		params->prof[i].tx_ring_num[TX] = params->max_num_tx_rings_p_up *

drivers/net/ethernet/mellanox/mlx4/mlx4_en.h

+1 −1
Original line number Diff line number Diff line
@@ -72,7 +72,7 @@ 
#define MLX4_EN_PAGE_SIZE	(1 << MLX4_EN_PAGE_SHIFT)

#define DEF_RX_RINGS		16

#define MAX_RX_RINGS		128

#define MIN_RX_RINGS		4

#define MIN_RX_RINGS		1

#define LOG_TXBB_SIZE		6

#define TXBB_SIZE		BIT(LOG_TXBB_SIZE)

#define HEADROOM		(2048 / TXBB_SIZE + 1)