[net-next 11/15] net/mlx5e: Reduce number of heap allocated buffers for update stats
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STALE3411d
REVIEWED: 1 (0M)
From: Saeed Mahameed <hidden>
Date: 2017-06-15 21:43:11
Subsystem:
mellanox ethernet driver (mlx5e), mellanox mlx5 core vpi driver, networking drivers, the rest · Maintainers:
Saeed Mahameed, Tariq Toukan, Mark Bloch, Leon Romanovsky, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
1 review trailer.
From: Gal Pressman <redacted> 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 <redacted> Reviewed-by: Eran Ben Elisha <redacted> Signed-off-by: Saeed Mahameed <redacted> Cc: kernel-team@fb.com --- drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 16 ++-------------- 1 file changed, 2 insertions(+), 14 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 51f686d737cb..50184021624e 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)
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2.11.0