udp: no longer touch sk->sk_refcnt in early demux

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After commits ca065d0cf8 ("udp: no longer use SLAB_DESTROY_BY_RCU")
and 7ae215d23c ("bpf: Don't refcount LISTEN sockets in sk_assign()")
UDP early demux no longer need to grab a refcount on the UDP socket.

This save two atomic operations per incoming packet for connected
sockets.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Joe Stringer <joe@wand.net.nz>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
Cc: Kuniyuki Iwashima <kuniyu@amazon.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

Eric Dumazet 2024-03-07 22:00:16 +00:00 • committed by David S. Miller

parent e996401e06

commit 08842c43d0

2 changed files with 6 additions and 4 deletions

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5

net/ipv4/udp.c

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5

net/ipv6/udp.c

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