linux-kernel - [PATCH 0/6] isolation: 1Hz residual tick offloading v5

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Date:   Thu,  8 Feb 2018 18:59:33 +0100
From:   Frederic Weisbecker <frederic@...nel.org>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Frederic Weisbecker <frederic@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Chris Metcalf <cmetcalf@...lanox.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Luiz Capitulino <lcapitulino@...hat.com>,
        Christoph Lameter <cl@...ux.com>,
        "Paul E . McKenney" <paulmck@...ux.vnet.ibm.com>,
        Ingo Molnar <mingo@...nel.org>,
        Wanpeng Li <kernellwp@...il.com>,
        Mike Galbraith <efault@....de>, Rik van Riel <riel@...hat.com>
Subject: [PATCH 0/6] isolation: 1Hz residual tick offloading v5

This series should address most reviews from Peterz in v4:

* Check that the remote tick doesn't come way too late. For that we
  track the last time we called update_curr() with checking
  tsk->se.exec_start which doesn't only account for ticks but also queue
  and dequeue events.

* Add comment to explain why we use HZ as a delay

* Feed changelog with explanation about correctness assumptions on
  calling rq::task_tick() remotely.

The last element is to enforce unbound workqueues to queue a work on
a CPU of the same node when the enqueuer is outside the unbound mask.
This will be sorted out seperately.

git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
	sched/0hz-v5

HEAD: 62711eb7856882d443615f0ef0ba9518977b7abd

Thanks,
	Frederic
---

Frederic Weisbecker (6):
      sched: Rename init_rq_hrtick to hrtick_rq_init
      nohz: Allow to check if remote CPU tick is stopped
      sched/isolation: Isolate workqueues when "nohz_full=" is set
      sched/isolation: Residual 1Hz scheduler tick offload
      sched/nohz: Remove the 1 Hz tick code
      sched/isolation: Tick offload documentation


 Documentation/admin-guide/kernel-parameters.txt |   6 +-
 include/linux/sched/isolation.h                 |   1 +
 include/linux/sched/nohz.h                      |   4 -
 include/linux/tick.h                            |   2 +
 kernel/sched/core.c                             | 116 ++++++++++++++++++------
 kernel/sched/idle_task.c                        |   1 -
 kernel/sched/isolation.c                        |   8 +-
 kernel/sched/sched.h                            |  13 +--
 kernel/time/tick-sched.c                        |  13 +--
 kernel/workqueue.c                              |   3 +-
 10 files changed, 115 insertions(+), 52 deletions(-)