linux-kernel - [GIT PULL] timers/nohz updates for v5.14

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Message-ID: <YNlzf+i1j/4wIUtC@gmail.com>
Date:   Mon, 28 Jun 2021 09:00:15 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Frédéric Weisbecker <fweisbec@...il.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: [GIT PULL] timers/nohz updates for v5.14

Linus,

Please pull the latest timers/nohz git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers-nohz-2021-06-28

   # HEAD: 09fe880ed7a160ebbffb84a0a9096a075e314d2f MAINTAINERS: Add myself as context tracking maintainer

Updates to the tick/nohz code in this cycle:

 - Micro-optimize tick_nohz_full_cpu()

 - Optimize idle exit tick restarts to be less eager

 - Optimize tick_nohz_dep_set_task() to only wake up
   a single CPU. This reduces IPIs and interruptions
   on nohz_full CPUs.

 - Optimize tick_nohz_dep_set_signal() in a similar
   fashion.

 - Skip IPIs in tick_nohz_kick_task() when trying
   to kick a non-running task.

 - Micro-optimize tick_nohz_task_switch() IRQ flags
   handling to reduce context switching costs.

 - Misc cleanups and fixes

 Thanks,

	Ingo

------------------>
Frederic Weisbecker (4):
      tick/nohz: Remove superflous check for CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
      tick/nohz: Update nohz_full Kconfig help
      tick/nohz: Only wake up a single target cpu when kicking a task
      MAINTAINERS: Add myself as context tracking maintainer

Marcelo Tosatti (2):
      tick/nohz: Change signal tick dependency to wake up CPUs of member tasks
      tick/nohz: Kick only _queued_ task whose tick dependency is updated

Peter Zijlstra (2):
      tick/nohz: Evaluate the CPU expression after the static key
      tick/nohz: Call tick_nohz_task_switch() with interrupts disabled

Yunfeng Ye (2):
      tick/nohz: Conditionally restart tick on idle exit
      tick/nohz: Update idle_exittime on actual idle exit


 MAINTAINERS                    |   6 ++
 include/linux/sched.h          |   2 +
 include/linux/tick.h           |  26 +++++----
 kernel/sched/core.c            |   7 ++-
 kernel/time/Kconfig            |  11 ++--
 kernel/time/posix-cpu-timers.c |   4 +-
 kernel/time/tick-sched.c       | 129 ++++++++++++++++++++++++++++-------------
 7 files changed, 125 insertions(+), 60 deletions(-)