linux-kernel - [PATCH v5 0/2] tcp/dcpp: Un-pin tw

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Date: Mon, 15 Apr 2024 13:34:34 +0200
From: Valentin Schneider <vschneid@...hat.com>
To: dccp@...r.kernel.org,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-rt-users@...r.kernel.org
Cc: "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	mleitner@...hat.com,
	David Ahern <dsahern@...nel.org>,
	Juri Lelli <juri.lelli@...hat.com>,
	Tomas Glozar <tglozar@...hat.com>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH v5 0/2] tcp/dcpp: Un-pin tw_timer

Hi,

This is v5 of the series where the tw_timer is un-pinned to get rid of
interferences in isolated CPUs setups.

The first patch is a new one stemming from Jakub's bug reported. It's there
mainly to make the reviewing a bit easier, but as it changes behaviour it should
be squashed with the second one.

Revisions
=========

v4 -> v5
++++++++

o Rebased against latest Linus' tree
o Converted tw_timer into a delayed work following Jakub's bug report on v4
  http://lore.kernel.org/r/20240411100536.224fa1e7@kernel.org

v3 -> v4
++++++++

o Rebased against latest Linus' tree
o Added ehash lock usage to serialize scheduling vs descheduling of the tw_timer
  (Paolo)

v2 -> v3
++++++++

o Dropped bh_disable patch
o Rebased against latest Linus' tree

RFCv1 -> v2
++++++++

o Added comment in inet_twsk_deschedule_put() to highlight the race
o Added bh_disable patch

Valentin Schneider (2):
  SQUASH: tcp/dcpp: Convert timewait timer into a delayed_work
  tcp/dcpp: Un-pin tw_timer

 include/net/inet_timewait_sock.h              |  8 +-
 net/dccp/minisocks.c                          |  9 +--
 net/ipv4/inet_diag.c                          |  2 +-
 net/ipv4/inet_timewait_sock.c                 | 73 +++++++++++++------
 net/ipv4/tcp_ipv4.c                           |  2 +-
 net/ipv4/tcp_minisocks.c                      |  9 +--
 net/ipv6/tcp_ipv6.c                           |  2 +-
 .../selftests/bpf/progs/bpf_iter_tcp4.c       |  2 +-
 .../selftests/bpf/progs/bpf_iter_tcp6.c       |  2 +-
 9 files changed, 69 insertions(+), 40 deletions(-)

--
2.43.0