[PATCH 0/8] sched/isolation: Split housekeeping cpumask

From: Frederic Weisbecker <frederic@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
	Frederic Weisbecker <frederic@kernel.org>,
	Tejun Heo <tj@kernel.org>, Juri Lelli <juri.lelli@redhat.com>,
	Alex Belits <abelits@marvell.com>, Nitesh Lal <nilal@redhat.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Nicolas Saenz <nsaenzju@redhat.com>,
	Christoph Lameter <cl@gentwo.de>,
	Marcelo Tosatti <mtosatti@redhat.com>,
	Zefan Li <lizefan.x@bytedance.com>,
	Paul Gortmaker <paul.gortmaker@windriver.com>,
	"Paul E . McKenney" <paulmck@kernel.org>
Subject: [PATCH 0/8] sched/isolation: Split housekeeping cpumask
Date: Tue,  4 Jan 2022 15:49:36 +0100	[thread overview]
Message-ID: <20220104144944.1278663-1-frederic@kernel.org> (raw)

Hi,

To prepare for extending cpusets to control CPU isolation features
(nohz_full, rcu_nocbs, unbound timers, workqueues, kthreads affinity...),
we need to split the global housekeeping_mask to one cpumask per isolation
feature.

Doing so is quite a chunk already so I'm working on that as a standalone
patchset. Once that get merged, the next step is to finally provide a
cpuset interface for one of these isolation features: rcu_nocb could
be interesting to handle first as nohz_full depends on it.

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

HEAD: 2c07a16ff50d1e722babee28b926d70522e6bd3e

Thanks,
	Frederic
---

Frederic Weisbecker (8):
      pci: Decouple HK_FLAG_WQ and HK_FLAG_DOMAIN cpumask fetch
      workqueue: Decouple HK_FLAG_WQ and HK_FLAG_DOMAIN cpumask fetch
      net: Decouple HK_FLAG_WQ and HK_FLAG_DOMAIN cpumask fetch
      sched/isolation: Use single feature type while referring to housekeeping cpumask
      sched/isolation: Consolidate check for housekeeping minimum service
      sched/isolation: Consolidate error handling
      sched/isolation: Fix housekeeping_mask memory leak
      sched/isolation: Split housekeeping cpumask per isolation features

 arch/x86/kernel/cpu/aperfmperf.c |   6 +-
 arch/x86/kvm/x86.c               |   2 +-
 drivers/base/cpu.c               |   2 +-
 drivers/pci/pci-driver.c         |  21 +++--
 include/linux/sched/isolation.h  |  43 ++++++-----
 kernel/cgroup/cpuset.c           |   6 +-
 kernel/cpu.c                     |   4 +-
 kernel/irq/cpuhotplug.c          |   4 +-
 kernel/irq/manage.c              |   4 +-
 kernel/kthread.c                 |   4 +-
 kernel/rcu/tasks.h               |   2 +-
 kernel/rcu/tree_plugin.h         |   2 +-
 kernel/sched/core.c              |  12 +--
 kernel/sched/fair.c              |  10 +--
 kernel/sched/isolation.c         | 162 +++++++++++++++++++++++++--------------
 kernel/sched/topology.c          |   8 +-
 kernel/watchdog.c                |   2 +-
 kernel/workqueue.c               |   4 +-
 net/core/net-sysfs.c             |   6 +-
 19 files changed, 180 insertions(+), 124 deletions(-)