netdev - [RFC net-next 0/4] tcp: backlog processing optims

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Message-ID: <20230906201046.463236-1-edumazet@google.com>
Date: Wed,  6 Sep 2023 20:10:42 +0000
From: Eric Dumazet <edumazet@...gle.com>
To: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>
Cc: netdev@...r.kernel.org, eric.dumazet@...il.com, 
	Soheil Hassas Yeganeh <soheil@...gle.com>, Neal Cardwell <ncardwell@...gle.com>, 
	Yuchung Cheng <ycheng@...gle.com>, Eric Dumazet <edumazet@...gle.com>
Subject: [RFC net-next 0/4] tcp: backlog processing optims

First patches are mostly preparing the ground for the last one.

Last patch of the series implements sort of ACK reduction
only for the cases a TCP receiver is under high stress,
which happens for high throughput flows.

This gives us a ~20% increase of single TCP flow (100Gbit -> 120Gbit)

Eric Dumazet (4):
  tcp: no longer release socket ownership in tcp_release_cb()
  net: sock_release_ownership() cleanup
  net: call prot->release_cb() when processing backlog
  tcp: defer regular ACK while processing socket backlog

 Documentation/networking/ip-sysctl.rst |  7 +++++++
 include/linux/tcp.h                    | 14 ++++++++------
 include/net/netns/ipv4.h               |  1 +
 include/net/sock.h                     |  9 ++++-----
 net/core/sock.c                        |  6 +++---
 net/ipv4/sysctl_net_ipv4.c             |  9 +++++++++
 net/ipv4/tcp_input.c                   |  8 ++++++++
 net/ipv4/tcp_ipv4.c                    |  1 +
 net/ipv4/tcp_output.c                  | 15 ++++-----------
 9 files changed, 45 insertions(+), 25 deletions(-)

-- 
2.42.0.283.g2d96d420d3-goog