diff mbox series

[net,05/12] net/mlx5: DR, Skip rehash for tables with byte mask zero

Message ID 20191120203519.24094-6-saeedm@mellanox.com
State Accepted
Delegated to: David Miller
Headers show
Series [net,01/12] net/mlx5e: Fix error flow cleanup in mlx5e_tc_tun_create_header_ipv4/6 | expand

Commit Message

Saeed Mahameed Nov. 20, 2019, 8:35 p.m. UTC 
From: Alex Vesker <valex@mellanox.com>

The byte mask fields affect on the hash index distribution,
when the byte mask is zero, the hash calculation will always
be equal to the same index.

To avoid unneeded rehash of hash tables mark the table to skip
rehash.

This is needed by the next patch which will limit table rehash
to reduce memory consumption.

Fixes: 41d07074154c ("net/mlx5: DR, Expose steering rule functionality")
Signed-off-by: Alex Vesker <valex@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/steering/dr_ste.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_ste.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_ste.c
index 4efe1b0be4a8..80680765d59c 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_ste.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_ste.c
@@ -671,7 +671,7 @@  static void dr_ste_set_ctrl(struct mlx5dr_ste_htbl *htbl)
 
 	htbl->ctrl.may_grow = true;
 
-	if (htbl->chunk_size == DR_CHUNK_SIZE_MAX - 1)
+	if (htbl->chunk_size == DR_CHUNK_SIZE_MAX - 1 || !htbl->byte_mask)
 		htbl->ctrl.may_grow = false;
 
 	/* Threshold is 50%, one is added to table of size 1 */