linux-kernel - [GIT PULL] Introduce housekeeping subsystem v5

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Date:   Tue, 24 Oct 2017 15:06:49 +0200
From:   Frederic Weisbecker <frederic@...nel.org>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        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>,
        Mike Galbraith <efault@....de>, Rik van Riel <riel@...hat.com>,
        Wanpeng Li <kernellwp@...il.com>
Subject: [GIT PULL] Introduce housekeeping subsystem v5

(No significant change since v4, only a rebase against -rc6)

Ingo,

Please pull the core/isolation-v5 branch that can be found at:

git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
	core/isolation-v5

HEAD: 64b71f4e9bffef1d7c9ffd2fae9b688be6da95b5

Summary of changes:

* Move the housekeeping code that was tied to NO_HZ to its own subsystem.
  Currently NO_HZ governs the other isolation features which is not right
  as dynticks is just an isolation feature like the others. We want to
  centralize the CPU isolation decisions to a subsystem of its own instead.

* Integrate isolcpus code to housekeeping and treat it as a CPU isolation
  feature.

* Reuse the "isolcpus=" kernel parameter to control the CPU isolation.
  For now only tick and domains can be isolated after this patchset:

       isolcpus=1-7         # isolate domains on CPU range 1 to 7
                            # "domain" flag is implicit by default to
                            # keep the current behaviour

       isolcpus=domain,1-7  # do the same

       isolcpus=nohz,1-7    # apply nohz_full to CPU range 1 to 7

       isolcpus=nohz,domain,1-7  # apply nohz_full and isolate domains of
                                 # CPU range 1 to 7

Thanks,
	Frederic
---

Frederic Weisbecker (12):
      housekeeping: Move housekeeping related code to its own file
      watchdog: Use housekeeping_cpumask() instead of ad-hoc version
      housekeeping: Provide a dynamic off-case to housekeeping_any_cpu()
      housekeeping: Make housekeeping cpumask private
      housekeeping: Use its own static key
      housekeeping: Rename is_housekeeping_cpu to housekeeping_cpu
      housekeeping: Move it under its own config, independant from NO_HZ
      housekeeping: Introduce housekeeping flags
      housekeeping: Handle nohz_full= parameter
      housekeeping: Move isolcpus to housekeeping
      housekeeping: Add basic isolcpus flags
      housekeeping: Document isolcpus flags


 Documentation/admin-guide/kernel-parameters.txt |  33 +++---
 drivers/base/cpu.c                              |  11 +-
 drivers/net/ethernet/tile/tilegx.c              |   6 +-
 include/linux/housekeeping.h                    |  51 ++++++++
 include/linux/sched.h                           |   2 -
 include/linux/tick.h                            |  39 +------
 init/Kconfig                                    |   7 ++
 init/main.c                                     |   2 +
 kernel/Makefile                                 |   1 +
 kernel/cgroup/cpuset.c                          |  15 +--
 kernel/housekeeping.c                           | 149 ++++++++++++++++++++++++
 kernel/rcu/tree_plugin.h                        |   3 +-
 kernel/rcu/update.c                             |   3 +-
 kernel/sched/core.c                             |  25 +---
 kernel/sched/fair.c                             |   3 +-
 kernel/sched/topology.c                         |  24 +---
 kernel/time/tick-sched.c                        |  31 +----
 kernel/watchdog.c                               |  13 +--
 18 files changed, 276 insertions(+), 142 deletions(-)