flush_delayed_work(9)

okay bestie, welcome to the Kernel API Manual page for flush_delayed_work(9) — yes, the (9) is part of the whole name, we love a consistent brand. This is the little function that handles a delayed work item’s last queueing and tells you whether it actually had to wait. Cute, useful, lowkey iconic. 🎀

🌸 NAME 🌸

flush_delayed_work — wait for a dwork to finish executing the last queueing. 💅

✨ SYNOPSIS ✨

bool flush_delayed_work (struct delayed_work *dwork );

🎀 ARGUMENTS 🎀

• dwork — the delayed work to flush. That’s the one, bestie.

🦋 DESCRIPTION 🦋

So here’s the vibe: Delayed timer is cancelled, and the pending work is queued for immediate execution. Slay. Like flush_work, this function only considers the last queueing instance of dwork — it’s not doing a whole history deep dive, just the most recent queueing. Periodt. ✨

💖 RETURN 💖

It gives you true if flush_work waited for the work to finish execution, and false if it was already idle. No cap. 🫶

🔥 SEE ALSO 🔥

Home base is the Kernel file ./kernel/workqueue.c, and then there’s this whole ensemble cast — every single one of these legends:

• for_each_pool(9), for_each_pool_worker(9), for_each_pwq(9), worker_pool_assign_id(9)
• unbound_effective_cpumask(9), get_work_pool(9), worker_set_flags(9), worker_clr_flags(9)
• worker_enter_idle(9), worker_leave_idle(9), find_worker_executing_work(9), move_linked_works(9)
• assign_work(9), kick_pool_pick(9), kick_pool(9), wq_worker_running(9)
• wq_worker_sleeping(9), wq_worker_tick(9), wq_worker_last_func(9), wq_node_nr_active(9)
• wq_update_node_max_active(9), get_pwq(9), put_pwq(9), put_pwq_unlocked(9)
• pwq_tryinc_nr_active(9), pwq_activate_first_inactive(9), unplug_oldest_pwq(9), node_activate_pending_pwq(9)
• pwq_dec_nr_active(9), pwq_dec_nr_in_flight(9), try_to_grab_pending(9), work_grab_pending(9)
• insert_work(9), queue_work_on(9), select_numa_node_cpu(9), queue_work_node(9)
• queue_delayed_work_on(9), mod_delayed_work_on(9), queue_rcu_work(9), worker_attach_to_pool(9)
• worker_detach_from_pool(9), create_worker(9), set_worker_dying(9), idle_worker_timeout(9)
• idle_cull_fn(9), maybe_create_worker(9), manage_workers(9), process_one_work(9)
• process_scheduled_works(9), worker_thread(9), rescuer_thread(9), check_flush_dependency(9)
• insert_wq_barrier(9), flush_workqueue_prep_pwqs(9), __flush_workqueue(9), drain_workqueue(9)
• flush_work(9), flush_rcu_work(9), cancel_work_sync(9), cancel_delayed_work(9)
• cancel_delayed_work_sync(9), disable_work(9), disable_work_sync(9), enable_work(9)
• disable_delayed_work(9), disable_delayed_work_sync(9), enable_delayed_work(9), schedule_on_each_cpu(9)
• execute_in_process_context(9), free_workqueue_attrs(9), alloc_workqueue_attrs(9), init_worker_pool(9)
• put_unbound_pool(9), get_unbound_pool(9), wq_calc_pod_cpumask(9), apply_workqueue_attrs(9)
• unbound_wq_update_pwq(9), wq_adjust_max_active(9), destroy_workqueue(9), workqueue_set_max_active(9)
• workqueue_set_min_active(9), current_work(9), current_is_workqueue_rescuer(9), current_is_workqueue_mem_reclaim(9)
• workqueue_congested(9), work_busy(9), set_worker_desc(9), print_worker_info(9)
• show_one_workqueue(9), show_one_worker_pool(9), show_all_workqueues(9), show_freezable_workqueues(9)
• rebind_workers(9), restore_unbound_workers_cpumask(9), work_on_cpu_key(9), freeze_workqueues_begin(9)
• freeze_workqueues_busy(9), thaw_workqueues(9), workqueue_unbound_housekeeping_update(9), workqueue_set_unbound_cpumask(9)
• workqueue_sysfs_register(9), workqueue_sysfs_unregister(9), workqueue_init_early(9), workqueue_init(9)
• llc_count_cores(9), llc_populate_cpu_shard_id(9), precompute_cache_shard_ids(9), workqueue_init_topology(9)

peace, love, and workqueues — this page’s source/version is ./kernel, dated October 2026, signing off for flush_delayed_work(9) 💖