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From: Artem Savkov <asavkov@redhat.com>
To: tglx@linutronix.de, jpoimboe@redhat.com, netdev@vger.kernel.org
Cc: davem@davemloft.net, yoshfuji@linux-ipv6.org, dsahern@kernel.org,
	linux-kernel@vger.kernel.org, Artem Savkov <asavkov@redhat.com>
Subject: [PATCH 0/2] Upper bound mode for kernel timers
Date: Wed, 23 Mar 2022 12:16:40 +0100	[thread overview]
Message-ID: <20220323111642.2517885-1-asavkov@redhat.com> (raw)

As previously discussed [1] we had a report of a regression in TCP keepalive
timer where timers were up to 4 minutes late resulting in disconnects.

This patchset tries to fix the problem by introducing upper bound kernel timers
and making tcp keepalive timer use those.

[1] https://lore.kernel.org/all/20210302001054.4qgrvnkltvkgikzr@treble/T/#u

Artem Savkov (2):
  timer: introduce upper bound timers
  net: make tcp keepalive timer upper bound

 include/linux/timer.h           |  3 ++-
 kernel/time/timer.c             | 36 ++++++++++++++++++++-------------
 net/ipv4/inet_connection_sock.c |  2 +-
 3 files changed, 25 insertions(+), 16 deletions(-)

-- 
2.34.1


             reply	other threads:[~2022-03-23 11:16 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-23 11:16 Artem Savkov [this message]
2022-03-23 11:16 ` [PATCH 1/2] timer: introduce upper bound timers Artem Savkov
2022-03-23 18:40   ` Josh Poimboeuf
2022-03-24  9:14     ` [PATCH v2 0/2] Upper bound mode for kernel timers Artem Savkov
2022-03-24  9:14       ` [PATCH v2 1/2] timer: introduce upper bound timers Artem Savkov
2022-03-24  9:15       ` [PATCH v2 2/2] net: make tcp keepalive timer upper bound Artem Savkov
2022-03-24 12:28   ` [PATCH 1/2] timer: introduce upper bound timers Thomas Gleixner
2022-03-24 13:54     ` Thomas Gleixner
2022-03-26 21:13     ` Thomas Gleixner
2022-03-30  8:20       ` [PATCH v3 0/2] Upper bound kernel timers Artem Savkov
2022-03-30  8:20         ` [PATCH v3 1/2] timer: add a function to adjust timeouts to be upper bound Artem Savkov
2022-03-30 13:40           ` Anna-Maria Behnsen
2022-04-02  6:55             ` Artem Savkov
2022-04-05 15:33               ` Thomas Gleixner
2022-04-07  7:52                 ` [PATCH v4 0/2] Upper bound kernel timers Artem Savkov
2022-04-07  7:52                   ` [PATCH v4 1/2] timer: add a function to adjust timeouts to be upper bound Artem Savkov
2022-04-08  0:37                     ` Thomas Gleixner
2022-04-08  5:39                       ` Josh Poimboeuf
2022-04-12 13:42                       ` Artem Savkov
2022-05-05 13:18                       ` [PATCH v5 0/2] Upper bound kernel timers Artem Savkov
2022-05-05 13:18                         ` [PATCH v5 1/2] timer: add a function to adjust timeouts to be upper bound Artem Savkov
2022-05-05 13:18                         ` [PATCH v5 2/2] net: make tcp keepalive timer " Artem Savkov
2022-05-05 17:56                           ` Josh Poimboeuf
2022-05-06  6:39                             ` Artem Savkov
2022-05-06 16:24                               ` Josh Poimboeuf
2022-07-26 22:42                         ` [PATCH v5 0/2] Upper bound kernel timers Josh Poimboeuf
2022-04-07  7:52                   ` [PATCH v4 2/2] net: make tcp keepalive timer upper bound Artem Savkov
     [not found]                 ` <Yk1i3WrcVIICAiF0@samus.usersys.redhat.com>
2022-04-07 23:26                   ` [PATCH v3 1/2] timer: add a function to adjust timeouts to be " Thomas Gleixner
2022-03-30  8:20         ` [PATCH v3 2/2] net: make tcp keepalive timer " Artem Savkov
2022-04-02  3:09           ` [net] 6ef3f95797: UBSAN:shift-out-of-bounds_in_kernel/time/timer.c kernel test robot
2022-04-02  7:11             ` Artem Savkov
2022-03-30 10:28         ` [PATCH v3 0/2] Upper bound kernel timers David Laight
2022-03-25  7:38   ` [timer] d41e0719d5: UBSAN:shift-out-of-bounds_in_lib/flex_proportions.c kernel test robot
2022-03-25 19:14     ` Thomas Gleixner
2022-03-23 11:16 ` [PATCH 2/2] net: make tcp keepalive timer upper bound Artem Savkov

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