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linux/samples/workqueue/stall_detector/wq_stall.c

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workqueue: Add stall detector sample module Add a sample module under samples/workqueue/stall_detector/ that reproduces a workqueue stall caused by PF_WQ_WORKER misuse. The module queues two work items on the same per-CPU pool, then clears PF_WQ_WORKER and sleeps in wait_event_idle(), hiding from the concurrency manager and stalling the second work item indefinitely. This is useful for testing the workqueue watchdog stall diagnostics. Signed-off-by: Breno Leitao <leitao@debian.org> Acked-by: Song Liu <song@kernel.org> Signed-off-by: Tejun Heo <tj@kernel.org>
2026-03-05 08:15:41 -08:00