net/mlx5: Add new list to store deleted flow counters
authorVlad Buslov <vladbu@mellanox.com>
Mon, 23 Jul 2018 08:32:05 +0000 (11:32 +0300)
committerSaeed Mahameed <saeedm@mellanox.com>
Thu, 6 Sep 2018 04:14:57 +0000 (21:14 -0700)
commit6e5e22839136fdb466af0aa46ff2404713dff974
treef08f3838fa6975aa4ceee8ce4c728f5f98a64a48
parent83033688b7ade18d2dbbcefa810f02ff66ba549d
net/mlx5: Add new list to store deleted flow counters

In order to prevent flow counters stats work function from traversing whole
flow counters tree while searching for deleted flow counters, new list to
store deleted flow counters is added to struct mlx5_fc_stats. Lockless
NULL-terminated single linked list data type is used due to following
reasons:
 - This use case only needs to add single element to list and
 remove/iterate whole list. Lockless list doesn't require any additional
 synchronization for these operations.
 - First cache line of flow counter data structure only has space to store
 single additional pointer, which precludes usage of double linked list.

Remove flow counter 'deleted' flag that is no longer needed.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Acked-by: Amir Vadai <amir@vadai.me>
Reviewed-by: Paul Blakey <paulb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
drivers/net/ethernet/mellanox/mlx5/core/fs_core.h
drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c
include/linux/mlx5/driver.h