Sebastian Andrzej Siewior d839a73179 net: Optimize xdp_do_flush() with bpf_net_context infos.
Every NIC driver utilizing XDP should invoke xdp_do_flush() after
processing all packages. With the introduction of the bpf_net_context
logic the flush lists (for dev, CPU-map and xsk) are lazy initialized
only if used. However xdp_do_flush() tries to flush all three of them so
all three lists are always initialized and the likely empty lists are
"iterated".
Without the usage of XDP but with CONFIG_DEBUG_NET the lists are also
initialized due to xdp_do_check_flushed().

Jakub suggest to utilize the hints in bpf_net_context and avoid invoking
the flush function. This will also avoiding initializing the lists which
are otherwise unused.

Introduce bpf_net_ctx_get_all_used_flush_lists() to return the
individual list if not-empty. Use the logic in xdp_do_flush() and
xdp_do_check_flushed(). Remove the not needed .*_check_flush().

Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2024-07-02 15:26:57 +02:00
..
2024-06-05 10:18:06 +01:00
2024-05-14 20:21:04 +02:00
2024-04-24 11:06:25 -07:00
2024-07-01 09:52:35 +01:00
2024-03-05 11:21:18 -08:00
2024-01-02 12:41:16 +00:00
2024-06-25 11:10:18 +02:00
2022-08-09 22:14:02 -07:00
2024-02-09 10:01:09 -08:00
2024-05-08 10:35:09 +01:00
2024-03-05 19:21:17 -08:00
2023-11-02 09:31:02 +01:00
2024-05-07 01:35:55 +02:00
2021-10-15 11:33:08 +01:00
2024-02-28 11:19:41 +00:00
2023-04-22 01:39:41 +02:00
2023-10-30 14:36:57 -07:00
2021-10-13 09:40:46 -07:00
2022-05-11 12:43:10 +01:00
2024-04-25 15:24:23 -07:00
2024-04-01 10:49:28 +01:00
2023-07-14 20:39:30 -07:00
2024-04-30 18:32:38 -07:00
2024-05-30 18:29:38 -07:00
2024-05-30 18:29:38 -07:00
2023-10-04 11:49:20 -07:00
2024-06-12 06:39:04 +01:00
2024-05-09 20:25:55 -07:00
2023-07-28 14:07:59 -07:00
2022-12-12 15:04:39 -08:00
2024-04-07 02:42:36 -04:00
2023-09-14 16:16:36 +02:00
2023-12-14 16:38:59 +01:00