From: Gal Pressman Date: Mon, 5 Jun 2017 13:45:45 +0000 (+0300) Subject: net/mlx5e: Reduce number of heap allocated buffers for update stats X-Git-Tag: v4.14-rc1~596^2~162^2~4 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0883b4f456f691a54df7a9ae5607ade456fa7b97;p=platform%2Fkernel%2Flinux-rpi3.git net/mlx5e: Reduce number of heap allocated buffers for update stats Allocating buffers on the heap every 200ms is something we should avoid, let's use buffers located on the stack instead. Signed-off-by: Gal Pressman Reviewed-by: Eran Ben Elisha Signed-off-by: Saeed Mahameed Cc: kernel-team@fb.com --- diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c index 51f686d..5018402 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c @@ -248,14 +248,10 @@ static void mlx5e_update_pport_counters(struct mlx5e_priv *priv) { struct mlx5e_pport_stats *pstats = &priv->stats.pport; struct mlx5_core_dev *mdev = priv->mdev; + u32 in[MLX5_ST_SZ_DW(ppcnt_reg)] = {0}; int sz = MLX5_ST_SZ_BYTES(ppcnt_reg); int prio; void *out; - u32 *in; - - in = kvzalloc(sz, GFP_KERNEL); - if (!in) - return; MLX5_SET(ppcnt_reg, in, local_port, 1); @@ -288,8 +284,6 @@ static void mlx5e_update_pport_counters(struct mlx5e_priv *priv) mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_PPCNT, 0, 0); } - - kvfree(in); } static void mlx5e_update_q_counter(struct mlx5e_priv *priv) @@ -307,22 +301,16 @@ static void mlx5e_update_pcie_counters(struct mlx5e_priv *priv) { struct mlx5e_pcie_stats *pcie_stats = &priv->stats.pcie; struct mlx5_core_dev *mdev = priv->mdev; + u32 in[MLX5_ST_SZ_DW(mpcnt_reg)] = {0}; int sz = MLX5_ST_SZ_BYTES(mpcnt_reg); void *out; - u32 *in; if (!MLX5_CAP_MCAM_FEATURE(mdev, pcie_performance_group)) return; - in = kvzalloc(sz, GFP_KERNEL); - if (!in) - return; - out = pcie_stats->pcie_perf_counters; MLX5_SET(mpcnt_reg, in, grp, MLX5_PCIE_PERFORMANCE_COUNTERS_GROUP); mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_MPCNT, 0, 0); - - kvfree(in); } void mlx5e_update_stats(struct mlx5e_priv *priv)