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Date:   Fri, 13 May 2022 16:26:05 +0100
From:   Pavel Begunkov <>
To:, "David S . Miller" <>,
        Jakub Kicinski <>,
        Paolo Abeni <>
Cc:     David Ahern <>,
        Eric Dumazet <>,,
        Pavel Begunkov <>
Subject: [PATCH net-next v3 00/10] UDP/IPv6 refactoring

Refactor UDP/IPv6 and especially udpv6_sendmsg() paths. The end result looks
cleaner than it was before and the series also removes a bunch of instructions
and other overhead from the hot path positively affecting performance.

Testing over dummy netdev with 16 byte packets yields 2240481 tx/s,
comparing to 2203417 tx/s previously, which is around +1.6%

v2: no code changes, just resending properly
v3: remove patch moving getfrag callback assignment
    add benchmark numbers

Pavel Begunkov (10):
  ipv6: optimise ipcm6 cookie init
  udp/ipv6: move pending section of udpv6_sendmsg
  udp/ipv6: prioritise the ip6 path over ip4 checks
  udp/ipv6: optimise udpv6_sendmsg() daddr checks
  udp/ipv6: optimise out daddr reassignment
  udp/ipv6: clean up udpv6_sendmsg's saddr init
  ipv6: partially inline fl6_update_dst()
  ipv6: refactor opts push in __ip6_make_skb()
  ipv6: improve opt-less __ip6_make_skb()
  ipv6: clean up ip6_setup_cork

 include/net/ipv6.h    |  24 +++----
 net/ipv6/datagram.c   |   4 +-
 net/ipv6/exthdrs.c    |  15 ++---
 net/ipv6/ip6_output.c |  53 +++++++--------
 net/ipv6/raw.c        |   8 +--
 net/ipv6/udp.c        | 153 ++++++++++++++++++++----------------------
 net/l2tp/l2tp_ip6.c   |   8 +--
 7 files changed, 120 insertions(+), 145 deletions(-)


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