linux-kernel - [PATCH 00/10] clockevents: Rearrange cpuhotplug operations

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Message-ID: <20241017165041.6954-1-frederic@kernel.org>
Date: Thu, 17 Oct 2024 18:50:31 +0200
From: Frederic Weisbecker <frederic@...nel.org>
To: LKML <linux-kernel@...r.kernel.org>
Cc: Frederic Weisbecker <frederic@...nel.org>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Anna-Maria Behnsen <anna-maria@...utronix.de>
Subject: [PATCH 00/10] clockevents: Rearrange cpuhotplug operations

Some recent RCU issues triggered with offline ticks uncovered
hotplug behaviour differences between oneshot and periodic ticks.
The former is disabled on the dying CPU but not the latter. Also
the clockevents hotplug code is quite chaotic. This is a proposal to
fix the situation.

Frederic Weisbecker (10):
  clockevents: Improve clockevents_notify_released() comment
  clockevents: Shutdown and unregister current clockevents at
    CPUHP_AP_TICK_DYING
  tick: Remove now unneeded low-res tick stop on CPUHP_AP_TICK_DYING
  arm/twd: Remove clockevents shutdown call on offlining
  clocksource/drivers/arm_arch_timer: Remove clockevents shutdown call
    on offlining
  clocksource/driver/arm_global_timer: Remove clockevents shutdown call
    on offlining
  drivers/clocksource/exynos_mct: Remove clockevents shutdown call on
    offlining
  clocksource/drivers/armada-370-xp: Remove clockevents shutdown call on
    offlining
  clocksource/drivers/qcom: Remove clockevents shutdown call on
    offlining
  drivers/clocksource/timer-tegra: Remove clockevents shutdown call on
    offlining

 arch/arm/kernel/smp_twd.c                 |  1 -
 drivers/clocksource/arm_arch_timer.c      |  2 -
 drivers/clocksource/arm_global_timer.c    |  1 -
 drivers/clocksource/exynos_mct.c          |  1 -
 drivers/clocksource/timer-armada-370-xp.c |  1 -
 drivers/clocksource/timer-qcom.c          |  1 -
 drivers/clocksource/timer-tegra.c         |  1 -
 include/linux/tick.h                      |  2 -
 kernel/cpu.c                              |  2 -
 kernel/time/clockevents.c                 | 45 ++++++++++++-----------
 kernel/time/tick-sched.c                  | 25 +++----------
 11 files changed, 30 insertions(+), 52 deletions(-)

-- 
2.46.0