[GIT PULL] workqueue: Changes for v7.3

[GIT PULL] workqueue: Changes for v7.3

[Tejun Heo]

Hello,

The following changes since commit f0e6f20cb52b14c2c441f04e21cef0c95d498cac:

  Merge tag 'ntfs3_for_7.2' of https://github.com/Paragon-Software-Group/linux-ntfs3 (2026-06-24 10:05:53 -0700)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git tags/wq-for-7.3

for you to fetch changes up to 20a80e7f6b71bd664c98e95589f0cbc68804d200:

  workqueue: annotate racy p->wake_cpu accesses in kick_pool_pick() (2026-08-13 07:00:19 -1000)

----------------------------------------------------------------
workqueue: Changes for v7.3

- Worker wakeups moved out of pool->lock on the hot paths, shortening lock
  hold times. The wakeup can be expensive on arm64 due to the idle wakeup
  IPI, and the change improves the workqueue microbenchmark there by up to
  10%.

- Stall diagnostics now report pools stuck with no running worker, with a
  backtrace of what the CPU is executing and the likely culprit worker,
  instead of dumping every in-flight worker.

- Preparation for turning per-cpu workqueues into an affinity scope of
  unbound workqueues instead of a separate backend.

- Race annotations for KCSAN and sparse warnings, and doc and monitoring
  script fixes.

----------------------------------------------------------------
Breno Leitao (21):
      workqueue: split kick_pool() into kick_pool_pick()
      workqueue: defer the worker wakeup outside pool->lock in __queue_work()
      workqueue: defer the worker wakeup outside pool->lock in process_one_work()
      workqueue: only show running workers in stall diagnostics
      workqueue: trigger a single-CPU backtrace for stalled pools
      workqueue: dump the last woken worker for stalled pools
      workqueue: annotate racy PWQ_STAT_CPU_TIME update in wq_worker_tick()
      workqueue: annotate racy sum_exec_runtime reads for CPU-intensive detection
      workqueue: factor out get_percpu_pool()
      workqueue: factor out alloc_and_link_percpu_pwqs()
      workqueue: release pwq pools by pool type
      workqueue: account nr_active by the backing pool
      workqueue: test WQ_UNBOUND explicitly in the hotplug loops
      workqueue: rename wq->unbound_attrs to wq->attrs
      workqueue: allocate attrs for all workqueues
      workqueue: rename alloc_unbound_pwq() to alloc_pwq()
      workqueue: skip the node_nr_active update for non-unbound workqueues
      workqueue: use rcu_dereference_sched() in workqueue_congested()
      workqueue: use RCU accessors when populating wq->cpu_pwq
      workqueue: BUG_ON() instead of returning NULL in wq_node_nr_active()
      workqueue: annotate racy p->wake_cpu accesses in kick_pool_pick()

Manuel Ebner (1):
      docs: workqueue: Fix bracket

Yousef Alhouseen (1):
      tools/workqueue: parse help before importing drgn

 Documentation/core-api/workqueue.rst |   2 +-
 kernel/workqueue.c                   | 323 ++++++++++++++++++++++++-----------
 tools/workqueue/wq_dump.py           |  16 +-
 tools/workqueue/wq_monitor.py        |   6 +-
 4 files changed, 240 insertions(+), 107 deletions(-)

-- 
tejun