Files
linux/include/net
Eric Dumazet fdae0ab67d net: use NUMA drop counters for softnet_data.dropped
Hosts under DOS attack can suffer from false sharing
in enqueue_to_backlog() : atomic_inc(&sd->dropped).

This is because sd->dropped can be touched from many cpus,
possibly residing on different NUMA nodes.

Generalize the sk_drop_counters infrastucture
added in commit c51613fa27 ("net: add sk->sk_drop_counters")
and use it to replace softnet_data.dropped
with NUMA friendly softnet_data.drop_counters.

This adds 64 bytes per cpu, maybe more in the future
if we increase the number of counters (currently 2)
per 'struct numa_drop_counters'.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20250909121942.1202585-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-09-14 11:35:17 -07:00
..
2024-10-08 15:33:49 -07:00
2024-12-09 14:44:59 -08:00
2025-09-02 15:52:24 -07:00
2025-01-20 12:16:04 -08:00
2025-04-24 17:03:45 -07:00
2025-07-08 18:05:25 -07:00
2025-07-07 16:55:54 -07:00
2025-03-24 10:26:53 +00:00
2022-08-09 22:14:02 -07:00
2024-05-08 10:35:09 +01:00
2024-08-26 09:37:23 -07:00
2025-08-29 19:36:31 -07:00
2024-11-13 18:49:50 -08:00
2024-08-26 09:37:23 -07:00
2025-08-26 17:34:31 -07:00
2025-09-03 15:16:49 -07:00
2024-05-07 01:35:55 +02:00
2024-08-26 09:37:23 -07:00
2021-10-15 11:33:08 +01:00
2024-02-28 11:19:41 +00:00
2025-08-26 17:34:31 -07:00
2025-09-08 18:06:21 -07:00
2024-12-06 17:43:08 -08:00
2021-10-13 09:40:46 -07:00
2024-08-26 09:37:23 -07:00
2025-04-15 08:21:46 -07:00
2023-07-14 20:39:30 -07:00
2025-09-01 13:15:14 -07:00
2024-08-26 09:37:23 -07:00
2024-08-26 09:37:23 -07:00
2025-06-27 15:34:19 -07:00
2025-09-03 15:08:20 -07:00
2025-04-11 18:58:10 -07:00
2025-07-04 09:32:35 +02:00
2025-04-11 18:58:10 -07:00
2024-05-30 18:29:38 -07:00
2025-09-08 18:06:21 -07:00
2023-10-04 11:49:20 -07:00
2025-07-11 11:00:57 -07:00
2023-07-28 14:07:59 -07:00
2022-12-12 15:04:39 -08:00
2025-08-28 13:14:50 +02:00
2023-09-14 16:16:36 +02:00