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Date:   Wed, 23 Mar 2022 12:16:40 +0100
From:   Artem Savkov <>
Cc:,,,, Artem Savkov <>
Subject: [PATCH 0/2] Upper bound mode for kernel timers

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.


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(-)


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