Eric Dumazet ee3577c5d3 af_packet: do not call packet_read_pending() from tpacket_destruct_skb() ... [ Upstream commit 581073f626 ] trafgen performance considerably sank on hosts with many cores after the blamed commit. packet_read_pending() is very expensive, and calling it in af_packet fast path defeats Daniel intent in commit b013840810 ("packet: use percpu mmap tx frame pending refcount") tpacket_destruct_skb() makes room for one packet, we can immediately wakeup a producer, no need to completely drain the tx ring. Fixes: 89ed5b5190 ("af_packet: Block execution of tasks waiting for transmit to complete in AF_PACKET") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Neil Horman <nhorman@tuxdriver.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://lore.kernel.org/r/20240515163358.4105915-1-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-06-12 11:12:12 +02:00
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af_packet.c	af_packet: do not call packet_read_pending() from tpacket_destruct_skb()	2024-06-12 11:12:12 +02:00
diag.c	af_packet: Fix data-races of pkt_sk(sk)->num.	2023-05-25 21:03:23 -07:00
internal.h	packet: Move reference count in packet_sock to atomic_long_t	2023-12-13 18:45:23 +01:00
Kconfig	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00