CKI Backport Bot 10e16692d5 af_packet: do not call packet_read_pending() from tpacket_destruct_skb() ... JIRA: https://issues.redhat.com/browse/RHEL-78307 commit 581073f626e387d3e7eed55c48c8495584ead7ba Author: Eric Dumazet <edumazet@google.com> Date: Wed May 15 16:33:58 2024 +0000 af_packet: do not call packet_read_pending() from tpacket_destruct_skb() 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: CKI Backport Bot <cki-ci-bot+cki-gitlab-backport-bot@redhat.com>		2025-02-07 13:57:37 +00:00
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af_packet.c	af_packet: do not call packet_read_pending() from tpacket_destruct_skb()	2025-02-07 13:57:37 +00:00
diag.c	af_packet: Fix data-races of pkt_sk(sk)->num.	2024-06-06 11:39:13 +02:00
internal.h	net/packet: convert po->pressure to an atomic flag	2024-06-06 11:39:13 +02:00