flush_rcu_work(9)

💖 flush_rcu_work(9) — from the Kernel API Manual, bestie edition 💖

okay so you're in the kernel docs, section 9, and you found flush_rcu_work(9). slay. let me explain it to you like we're texting at 2am 🫶

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✨ NAME ✨

flush_rcu_work — literally just wait for a rwork to finish executing the last queueing. that's the whole vibe. you queue something, you wanna know when it's done, you call this. periodt 💅

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🌸 SYNOPSIS 🌸

bool flush_rcu_work (struct rcu_work *rwork );

look at that signature. one argument, returns a bool. no cap, that's it 🎀

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🦋 ARGUMENTS 🦋

• rwork — the rcu work to flush. that's your little guy. the work item you're waiting on. go get 'em 🔥

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⭐ RETURN ⭐

• true — if flush_rcu_work waited for the work to finish execution. it actually sat there and waited, and it's telling you so 👑
• false — if it was already idle. no waiting needed, it was already chilling, nothing to do 🙈

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🌈 SEE ALSO 🌈

Kernel file ./kernel/workqueue.c — and honestly the whole workqueue friend group showed up for this one, iykyk: 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_delayed_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).

like I said. the whole group chat 💀

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and that's the page!! mwah 💋 this one came from the source ./kernel, dated October 2026, flush_rcu_work(9), part of the Kernel API Manual. go flush your rcu work, bestie, you got this 🌸💜✨