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Message-ID: <20231115210509.481514-1-vschneid@redhat.com>
Date: Wed, 15 Nov 2023 16:05:07 -0500
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>,
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 v2 0/2] tcp/dcpp: tw_timer tweaks for nohz_full and PREEMPT_RT
Hi,
This is v2 of [1] where the tw_timer is un-pinned to get rid of interferences in
isolated CPUs setups.
Patch 1 is pretty much the same as v1, just got an extra comment in
inet_twsk_deschedule_put() to highlight the race.
Patch 2 was added as AFAICT the bh_disable is no longer needed after patch 1,
and Sebastian mentioned during LPC the he had been looking at getting rid of it
for removing softirq_ctrl.lock in PREEMPT_RT.
Eric mentionned rsk_timer needs looking into, but I haven't had the time to do
that. It doesn't show up in our testing, which might be due to its relatively
low timeout (IIUC 3s).
[1]: https://lore.kernel.org/all/20231016125934.1970789-1-vschneid@redhat.com/
Valentin Schneider (2):
tcp/dcpp: Un-pin tw_timer
tcp/dcpp: Don't disable bh around timewait_sock initialization
net/dccp/minisocks.c | 14 ++++----------
net/ipv4/inet_timewait_sock.c | 20 +++++++++++++++-----
net/ipv4/tcp_minisocks.c | 14 ++++----------
3 files changed, 23 insertions(+), 25 deletions(-)
--
2.41.0
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