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net/mlx5: Add new list to store deleted flow counters

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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>
This commit is contained in:
Vlad Buslov
2018-07-23 11:32:05 +03:00
committed by Saeed Mahameed
parent 83033688b7
commit 6e5e228391
3 changed files with 14 additions and 23 deletions
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include/linux/mlx5/driver.h
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@@ -585,6 +585,7 @@ struct mlx5_irq_info {
struct mlx5_fc_stats {
struct rb_root counters;
struct llist_head addlist;
struct llist_head dellist;
struct workqueue_struct *wq;
struct delayed_work work;