From: Alaa Hleihel Date: Tue, 9 Oct 2018 09:06:52 +0000 (+0300) Subject: net/mlx4_en: Use minimal rx and tx ring sizes on kdump kernel X-Git-Tag: v4.20-rc1~27^2~122 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=27055454b43009b6775a7ce70907bb298f4fab1e;p=thirdparty%2Fkernel%2Flinux.git 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: Alaa Hleihel Signed-off-by: Tariq Toukan Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/mellanox/mlx4/en_main.c b/drivers/net/ethernet/mellanox/mlx4/en_main.c index d25e16d2c3191..109472d6b61f1 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_main.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_main.c @@ -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; - params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE; - params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE; + 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 * diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h index c3228b89df463..485d856546c6c 100644 --- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h +++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h @@ -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)