linux-kernel - [GIT PULL] sched/urgent for v5.11-rc5

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Date:   Sun, 24 Jan 2021 12:58:19 +0100
From:   Borislav Petkov <bp@...e.de>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     x86-ml <x86@...nel.org>, lkml <linux-kernel@...r.kernel.org>
Subject: [GIT PULL] sched/urgent for v5.11-rc5

Hi Linus,

please pull the sched/urgent fixes for v5.11.

Thx.

---

The following changes since commit 7c53f6b671f4aba70ff15e1b05148b10d58c2837:

  Linux 5.11-rc3 (2021-01-10 14:34:50 -0800)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git tags/sched_urgent_for_v5.11_rc5

for you to fetch changes up to 741ba80f6f9a4702089c122129f22df9774b3e64:

  sched: Relax the set_cpus_allowed_ptr() semantics (2021-01-22 15:09:44 +0100)

----------------------------------------------------------------
 - Correct the marking of kthreads which are supposed to run on a specific,
 single CPU vs such which are affine to only one CPU, mark per-cpu workqueue
 threads as such and make sure that marking "survives" CPU hotplug. Fix CPU
 hotplug issues with such kthreads.

 - A fix to not push away tasks on CPUs coming online.

 - Have workqueue CPU hotplug code use cpu_possible_mask when breaking affinity
   on CPU offlining so that pending workers can finish on newly arrived onlined
   CPUs too.

 - Dump tasks which haven't vacated a CPU which is currently being unplugged.

 - Register a special scale invariance callback which gets called on resume
 from RAM to read out APERF/MPERF after resume and thus make the schedutil
 scaling governor more precise.

----------------------------------------------------------------
Lai Jiangshan (1):
      workqueue: Use cpu_possible_mask instead of cpu_active_mask to break affinity

Peter Zijlstra (7):
      sched: Don't run cpu-online with balance_push() enabled
      kthread: Extract KTHREAD_IS_PER_CPU
      workqueue: Tag bound workers with KTHREAD_IS_PER_CPU
      workqueue: Restrict affinity change to rescuer
      sched: Prepare to use balance_push in ttwu()
      sched: Fix CPU hotplug / tighten is_per_cpu_kthread()
      sched: Relax the set_cpus_allowed_ptr() semantics

Rafael J. Wysocki (1):
      x86: PM: Register syscore_ops for scale invariance

Valentin Schneider (1):
      sched/core: Print out straggler tasks in sched_cpu_dying()

 arch/x86/kernel/smpboot.c |  19 ++++++++
 include/linux/kthread.h   |   3 ++
 kernel/kthread.c          |  27 ++++++++++-
 kernel/sched/core.c       | 111 ++++++++++++++++++++++++++++++++++++----------
 kernel/sched/sched.h      |   1 +
 kernel/smpboot.c          |   1 +
 kernel/workqueue.c        |  22 +++++----
 7 files changed, 151 insertions(+), 33 deletions(-)

-- 
Regards/Gruss,
    Boris.

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