linux-kernel - [PATCH -v2 00/17] sched: Migrate disable support

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Message-ID: <20201005145717.346020688@infradead.org>
Date:   Mon, 05 Oct 2020 16:57:17 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     tglx@...utronix.de, mingo@...nel.org
Cc:     linux-kernel@...r.kernel.org, bigeasy@...utronix.de,
        qais.yousef@....com, swood@...hat.com, peterz@...radead.org,
        valentin.schneider@....com, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
        bristot@...hat.com, vincent.donnefort@....com, tj@...nel.org
Subject: [PATCH -v2 00/17] sched: Migrate disable support

Hi,

Seconds version of migrate_disable(); it has a bunch of bugs fixed and has
grown rt/dl balancer changes to push away tasks that inhibit the migration of
migrate_disable() tasks.

I still don't like it much, and it very much hurts my brain, but it seems to have
stopped crashing in weird and wonderful ways.

Tested on PREEMPT_RT.

---
 fs/proc/array.c               |   4 +-
 include/linux/cpuhotplug.h    |   1 +
 include/linux/cpumask.h       |   6 +
 include/linux/preempt.h       |  64 ++++
 include/linux/sched.h         |   5 +
 include/linux/sched/hotplug.h |   2 +
 include/linux/stop_machine.h  |   5 +
 include/trace/events/sched.h  |  12 +
 kernel/cpu.c                  |   9 +-
 kernel/sched/core.c           | 764 ++++++++++++++++++++++++++++++++----------
 kernel/sched/cpudeadline.c    |   4 +-
 kernel/sched/cpupri.c         |   4 +-
 kernel/sched/deadline.c       |  43 ++-
 kernel/sched/rt.c             |  84 +++--
 kernel/sched/sched.h          |  59 +++-
 kernel/stop_machine.c         |  23 +-
 kernel/workqueue.c            |   4 +
 lib/cpumask.c                 |  18 +
 lib/dump_stack.c              |   2 +
 lib/smp_processor_id.c        |   5 +
 20 files changed, 895 insertions(+), 223 deletions(-)