wq_update_node_max_active(9)

💖 wq_update_node_max_active(9) 💖

okay so this is the Kernel API Manual page for wq_update_node_max_active, and it's literally the function that keeps per-node max_actives in check. no cap, bestie, we're getting into it. ✨

✨ NAME ✨

wq_update_node_max_active — update per-node max_actives to use. 🎀

🌸 SYNOPSIS 🌸

void wq_update_node_max_active (struct workqueue_struct *wq , int
off_cpu );

🦋 ARGUMENTS 🦋

• wq — the workqueue to update. main character energy, honestly. 👑
• off_cpu — the CPU that's going down; it's -1 if a CPU is not going down. 🫶

💅 DESCRIPTION 💅

okay so this function updates wq->node_nr_active[]->max. that's the whole vibe. 💖

🚨 real talk: wq must be unbound. not optional, bestie.

max_active is distributed among nodes according to the proportions of numbers of online cpus. the way it does math? iconic. and the result is always between wq->min_active and max_active. periodt. ✨

💜 SEE ALSO 💜

Kernel file ./kernel/workqueue.c is the source spot. the whole linked crew is here, no skips:

• 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), 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), 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)

mwah 💋 — this page is from ./kernel, dated October 2026, and it's all about wq_update_node_max_active(9). byeee 🫶✨