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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-06-27 16:32:52 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-06-27 16:32:52 -0700 |
| commit | 7ab044a4f42aecba23db5ce96e763e5ec807bf42 (patch) | |
| tree | 057896b2b9749e0a380e088bf4a749fb3a59b2e4 /lib | |
| parent | 18eb3b6dff007f2e4ef4f0d8567dfb5cdb6086fc (diff) | |
| parent | 18c8ae813156a6855f026de80fffb91e1a28ab3d (diff) | |
Merge tag 'wq-for-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
Pull workqueue updates from Tejun Heo:
- Concurrency-managed per-cpu work items that hog CPUs and delay the
execution of other work items are now automatically detected and
excluded from concurrency management. Reporting on such work items
can also be enabled through a config option.
- Added tools/workqueue/wq_monitor.py which improves visibility into
workqueue usages and behaviors.
- Arnd's minimal fix for gcc-13 enum warning on 32bit compiles,
superseded by commit afa4bb778e48 in mainline.
* tag 'wq-for-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
workqueue: Disable per-cpu CPU hog detection when wq_cpu_intensive_thresh_us is 0
workqueue: Fix WARN_ON_ONCE() triggers in worker_enter_idle()
workqueue: fix enum type for gcc-13
workqueue: Track and monitor per-workqueue CPU time usage
workqueue: Report work funcs that trigger automatic CPU_INTENSIVE mechanism
workqueue: Automatically mark CPU-hogging work items CPU_INTENSIVE
workqueue: Improve locking rule description for worker fields
workqueue: Move worker_set/clr_flags() upwards
workqueue: Re-order struct worker fields
workqueue: Add pwq->stats[] and a monitoring script
Further upgrade queue_work_on() comment
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig.debug | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index f2d6e9dd8021..1d5c3bc40113 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1134,6 +1134,19 @@ config WQ_WATCHDOG state. This can be configured through kernel parameter "workqueue.watchdog_thresh" and its sysfs counterpart. +config WQ_CPU_INTENSIVE_REPORT + bool "Report per-cpu work items which hog CPU for too long" + depends on DEBUG_KERNEL + help + Say Y here to enable reporting of concurrency-managed per-cpu work + items that hog CPUs for longer than + workqueue.cpu_intensive_threshold_us. Workqueue automatically + detects and excludes them from concurrency management to prevent + them from stalling other per-cpu work items. Occassional + triggering may not necessarily indicate a problem. Repeated + triggering likely indicates that the work item should be switched + to use an unbound workqueue. + config TEST_LOCKUP tristate "Test module to generate lockups" depends on m |