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net/mlx5: DR, Skip rehash for tables with byte mask zero 

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: 41d0707415 ("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>
This commit is contained in:
Alex Vesker 2019-10-31 15:24:59 +02:00 committed by Saeed Mahameed
parent 829969956f
commit 83e7948913
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/mellanox/mlx5/core/steering/dr_ste.c
View File

@ -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 */