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Linux Systems Field Manual

linux/kernel/workqueue.c

Imported from _research/manual-study-linux/file-notes/linux__kernel__workqueue.c.md.

File Notes: kernel/workqueue.c

Status: reviewed.

Purpose: deferred work execution model.

Review target: work item ownership, worker pools, ordering, cancellation, and AI-agent job scheduling implications.

Evidence

  • struct worker_pool is defined around line 195.
  • struct pool_workqueue appears around line 269.
  • struct workqueue_struct appears around line 349.
  • System workqueues are declared around lines 524-544.
  • try_to_grab_pending() around lines 2063-2090 handles cancellation/pending races.
  • __queue_work() appears around line 2275 and queue_work_on() around lines 2429-2442.
  • Delayed work paths appear around lines 2542-2608.
  • process_one_work() appears around lines 3207-3220.
  • worker_thread() appears around lines 3420-3431.

Design Notes

Workqueues are the process-context deferred execution layer. Rust should encode queued/running/canceled/completed states and prevent queued work from outliving its captured data.