Lines Matching full:work
18 * This is the generic async execution mechanism. Work items as are
21 * normal work items and the other for high priority ones) and some extra
212 * When pwq->nr_active >= max_active, new work item is queued to
216 * All work items marked with WORK_STRUCT_INACTIVE do not participate
217 * in pwq->nr_active and all work items in pwq->inactive_works are
219 * work items are in pwq->inactive_works. Some of them are ready to
220 * run in pool->worklist or worker->scheduled. Those work itmes are
222 * not participate in pwq->nr_active. For non-barrier work item, it
253 * The externally visible workqueue. It relays the issued work items to
261 int work_color; /* WQ: current work color */
328 /* PL: allowable cpus for unbound wqs and work items */
331 /* CPU where unbound work was last round robin scheduled from this CPU */
335 * Local execution of unbound work items is no longer guaranteed. The
336 * following always forces round-robin CPU selection on unbound work items
457 struct work_struct *work = addr; in work_is_static_object() local
459 return test_bit(WORK_STRUCT_STATIC_BIT, work_data_bits(work)); in work_is_static_object()
468 struct work_struct *work = addr; in work_fixup_init() local
472 cancel_work_sync(work); in work_fixup_init()
473 debug_object_init(work, &work_debug_descr); in work_fixup_init()
486 struct work_struct *work = addr; in work_fixup_free() local
490 cancel_work_sync(work); in work_fixup_free()
491 debug_object_free(work, &work_debug_descr); in work_fixup_free()
506 static inline void debug_work_activate(struct work_struct *work) in debug_work_activate() argument
508 debug_object_activate(work, &work_debug_descr); in debug_work_activate()
511 static inline void debug_work_deactivate(struct work_struct *work) in debug_work_deactivate() argument
513 debug_object_deactivate(work, &work_debug_descr); in debug_work_deactivate()
516 void __init_work(struct work_struct *work, int onstack) in __init_work() argument
519 debug_object_init_on_stack(work, &work_debug_descr); in __init_work()
521 debug_object_init(work, &work_debug_descr); in __init_work()
525 void destroy_work_on_stack(struct work_struct *work) in destroy_work_on_stack() argument
527 debug_object_free(work, &work_debug_descr); in destroy_work_on_stack()
531 void destroy_delayed_work_on_stack(struct delayed_work *work) in destroy_delayed_work_on_stack() argument
533 destroy_timer_on_stack(&work->timer); in destroy_delayed_work_on_stack()
534 debug_object_free(&work->work, &work_debug_descr); in destroy_delayed_work_on_stack()
539 static inline void debug_work_activate(struct work_struct *work) { } in debug_work_activate() argument
540 static inline void debug_work_deactivate(struct work_struct *work) { } in debug_work_deactivate() argument
611 * While queued, %WORK_STRUCT_PWQ is set and non flag bits of a work's data
617 * work->data. These functions should only be called while the work is
621 * corresponding to a work. Pool is available once the work has been
623 * available only while the work item is queued.
625 * %WORK_OFFQ_CANCELING is used to mark a work item which is being
626 * canceled. While being canceled, a work item may have its PENDING set
630 static inline void set_work_data(struct work_struct *work, unsigned long data, in set_work_data() argument
633 WARN_ON_ONCE(!work_pending(work)); in set_work_data()
634 atomic_long_set(&work->data, data | flags | work_static(work)); in set_work_data()
637 static void set_work_pwq(struct work_struct *work, struct pool_workqueue *pwq, in set_work_pwq() argument
640 set_work_data(work, (unsigned long)pwq, in set_work_pwq()
644 static void set_work_pool_and_keep_pending(struct work_struct *work, in set_work_pool_and_keep_pending() argument
647 set_work_data(work, (unsigned long)pool_id << WORK_OFFQ_POOL_SHIFT, in set_work_pool_and_keep_pending()
651 static void set_work_pool_and_clear_pending(struct work_struct *work, in set_work_pool_and_clear_pending() argument
656 * test_and_set_bit(PENDING) and ensures all updates to @work made in set_work_pool_and_clear_pending()
661 set_work_data(work, (unsigned long)pool_id << WORK_OFFQ_POOL_SHIFT, 0); in set_work_pool_and_clear_pending()
665 * work->current_func, which is executed afterwards. This possible in set_work_pool_and_clear_pending()
667 * the same @work. E.g. consider this case: in set_work_pool_and_clear_pending()
678 * 7 work->current_func() { in set_work_pool_and_clear_pending()
685 * a @work is not queued in a hope, that CPU#1 will eventually in set_work_pool_and_clear_pending()
686 * finish the queued @work. Meanwhile CPU#1 does not see in set_work_pool_and_clear_pending()
693 static void clear_work_data(struct work_struct *work) in clear_work_data() argument
696 set_work_data(work, WORK_STRUCT_NO_POOL, 0); in clear_work_data()
699 static struct pool_workqueue *get_work_pwq(struct work_struct *work) in get_work_pwq() argument
701 unsigned long data = atomic_long_read(&work->data); in get_work_pwq()
710 * get_work_pool - return the worker_pool a given work was associated with
711 * @work: the work item of interest
722 * Return: The worker_pool @work was last associated with. %NULL if none.
724 static struct worker_pool *get_work_pool(struct work_struct *work) in get_work_pool() argument
726 unsigned long data = atomic_long_read(&work->data); in get_work_pool()
743 * get_work_pool_id - return the worker pool ID a given work is associated with
744 * @work: the work item of interest
746 * Return: The worker_pool ID @work was last associated with.
749 static int get_work_pool_id(struct work_struct *work) in get_work_pool_id() argument
751 unsigned long data = atomic_long_read(&work->data); in get_work_pool_id()
760 static void mark_work_canceling(struct work_struct *work) in mark_work_canceling() argument
762 unsigned long pool_id = get_work_pool_id(work); in mark_work_canceling()
765 set_work_data(work, pool_id | WORK_OFFQ_CANCELING, WORK_STRUCT_PENDING); in mark_work_canceling()
768 static bool work_is_canceling(struct work_struct *work) in work_is_canceling() argument
770 unsigned long data = atomic_long_read(&work->data); in work_is_canceling()
926 * wq_worker_last_func - retrieve worker's last work function
927 * @task: Task to retrieve last work function of.
946 * The last work function %current executed as a worker, NULL if it
947 * hasn't executed any work yet.
1011 * find_worker_executing_work - find worker which is executing a work
1013 * @work: work to find worker for
1015 * Find a worker which is executing @work on @pool by searching
1016 * @pool->busy_hash which is keyed by the address of @work. For a worker
1017 * to match, its current execution should match the address of @work and
1018 * its work function. This is to avoid unwanted dependency between
1019 * unrelated work executions through a work item being recycled while still
1022 * This is a bit tricky. A work item may be freed once its execution
1024 * another work item. If the same work item address ends up being reused
1026 * recycled work item as currently executing and make it wait until the
1029 * This function checks the work item address and work function to avoid
1031 * work function which can introduce dependency onto itself through a
1032 * recycled work item. Well, if somebody wants to shoot oneself in the
1034 * actually occurs, it should be easy to locate the culprit work function.
1040 * Pointer to worker which is executing @work if found, %NULL
1044 struct work_struct *work) in find_worker_executing_work() argument
1049 (unsigned long)work) in find_worker_executing_work()
1050 if (worker->current_work == work && in find_worker_executing_work()
1051 worker->current_func == work->func) in find_worker_executing_work()
1059 * @work: start of series of works to be scheduled
1060 * @head: target list to append @work to
1063 * Schedule linked works starting from @work to @head. Work series to
1064 * be scheduled starts at @work and includes any consecutive work with
1067 * If @nextp is not NULL, it's updated to point to the next work of
1068 * the last scheduled work. This allows move_linked_works() to be
1074 static void move_linked_works(struct work_struct *work, struct list_head *head, in move_linked_works() argument
1083 list_for_each_entry_safe_from(work, n, NULL, entry) { in move_linked_works()
1084 list_move_tail(&work->entry, head); in move_linked_works()
1085 if (!(*work_data_bits(work) & WORK_STRUCT_LINKED)) in move_linked_works()
1130 * the release work item is scheduled on a per-cpu workqueue. To in put_pwq()
1156 static void pwq_activate_inactive_work(struct work_struct *work) in pwq_activate_inactive_work() argument
1158 struct pool_workqueue *pwq = get_work_pwq(work); in pwq_activate_inactive_work()
1160 trace_workqueue_activate_work(work); in pwq_activate_inactive_work()
1163 move_linked_works(work, &pwq->pool->worklist, NULL); in pwq_activate_inactive_work()
1164 __clear_bit(WORK_STRUCT_INACTIVE_BIT, work_data_bits(work)); in pwq_activate_inactive_work()
1170 struct work_struct *work = list_first_entry(&pwq->inactive_works, in pwq_activate_first_inactive() local
1173 pwq_activate_inactive_work(work); in pwq_activate_first_inactive()
1179 * @work_data: work_data of work which left the queue
1181 * A work either has completed or is removed from pending queue,
1224 * try_to_grab_pending - steal work item from worklist and disable irq
1225 * @work: work item to steal
1226 * @is_dwork: @work is a delayed_work
1229 * Try to grab PENDING bit of @work. This function can handle @work in any
1235 * 1 if @work was pending and we successfully stole PENDING
1236 * 0 if @work was idle and we claimed PENDING
1238 * -ENOENT if someone else is canceling @work, this state may persist
1243 * On >= 0 return, the caller owns @work's PENDING bit. To avoid getting
1244 * interrupted while holding PENDING and @work off queue, irq must be
1253 static int try_to_grab_pending(struct work_struct *work, bool is_dwork, in try_to_grab_pending() argument
1263 struct delayed_work *dwork = to_delayed_work(work); in try_to_grab_pending()
1275 if (!test_and_set_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(work))) in try_to_grab_pending()
1283 pool = get_work_pool(work); in try_to_grab_pending()
1289 * work->data is guaranteed to point to pwq only while the work in try_to_grab_pending()
1290 * item is queued on pwq->wq, and both updating work->data to point in try_to_grab_pending()
1292 * pwq->pool->lock. This in turn guarantees that, if work->data in try_to_grab_pending()
1293 * points to pwq which is associated with a locked pool, the work in try_to_grab_pending()
1296 pwq = get_work_pwq(work); in try_to_grab_pending()
1298 debug_work_deactivate(work); in try_to_grab_pending()
1301 * A cancelable inactive work item must be in the in try_to_grab_pending()
1305 * An inactive work item cannot be grabbed directly because in try_to_grab_pending()
1306 * it might have linked barrier work items which, if left in try_to_grab_pending()
1308 * management later on and cause stall. Make sure the work in try_to_grab_pending()
1311 if (*work_data_bits(work) & WORK_STRUCT_INACTIVE) in try_to_grab_pending()
1312 pwq_activate_inactive_work(work); in try_to_grab_pending()
1314 list_del_init(&work->entry); in try_to_grab_pending()
1315 pwq_dec_nr_in_flight(pwq, *work_data_bits(work)); in try_to_grab_pending()
1317 /* work->data points to pwq iff queued, point to pool */ in try_to_grab_pending()
1318 set_work_pool_and_keep_pending(work, pool->id); in try_to_grab_pending()
1328 if (work_is_canceling(work)) in try_to_grab_pending()
1335 * insert_work - insert a work into a pool
1336 * @pwq: pwq @work belongs to
1337 * @work: work to insert
1341 * Insert @work which belongs to @pwq after @head. @extra_flags is or'd to
1347 static void insert_work(struct pool_workqueue *pwq, struct work_struct *work, in insert_work() argument
1352 /* record the work call stack in order to print it in KASAN reports */ in insert_work()
1353 kasan_record_aux_stack(work); in insert_work()
1355 /* we own @work, set data and link */ in insert_work()
1356 set_work_pwq(work, pwq, extra_flags); in insert_work()
1357 list_add_tail(&work->entry, head); in insert_work()
1372 * Test whether @work is being queued from another work executing on the
1381 * Return %true iff I'm a worker executing a work item on @wq. If in is_chained_work()
1388 * When queueing an unbound work item to a wq, prefer local CPU if allowed
1421 struct work_struct *work) in __queue_work() argument
1430 * While a work item is PENDING && off queue, a task trying to in __queue_work()
1444 /* pwq which will be used unless @work is executing elsewhere */ in __queue_work()
1456 * If @work was previously on a different pool, it might still be in __queue_work()
1457 * running there, in which case the work needs to be queued on that in __queue_work()
1460 last_pool = get_work_pool(work); in __queue_work()
1466 worker = find_worker_executing_work(last_pool, work); in __queue_work()
1484 * work items are executing on it, so the retrying is guaranteed to in __queue_work()
1499 trace_workqueue_queue_work(req_cpu, pwq, work); in __queue_work()
1501 if (WARN_ON(!list_empty(&work->entry))) in __queue_work()
1508 trace_workqueue_activate_work(work); in __queue_work()
1518 debug_work_activate(work); in __queue_work()
1519 insert_work(pwq, work, worklist, work_flags); in __queue_work()
1527 * queue_work_on - queue work on specific cpu
1528 * @cpu: CPU number to execute work on
1530 * @work: work to queue
1532 * We queue the work to a specific CPU, the caller must ensure it
1535 * Return: %false if @work was already on a queue, %true otherwise.
1538 struct work_struct *work) in queue_work_on() argument
1545 if (!test_and_set_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(work))) { in queue_work_on()
1546 __queue_work(cpu, wq, work); in queue_work_on()
1562 * available CPU if we need to schedule this work.
1589 * queue_work_node - queue work on a "random" cpu for a given NUMA node
1590 * @node: NUMA node that we are targeting the work for
1592 * @work: work to queue
1594 * We queue the work to a "random" CPU within a given NUMA node. The basic
1595 * idea here is to provide a way to somehow associate work with a given
1606 * Return: %false if @work was already on a queue, %true otherwise.
1609 struct work_struct *work) in queue_work_node() argument
1627 if (!test_and_set_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(work))) { in queue_work_node()
1630 __queue_work(cpu, wq, work); in queue_work_node()
1644 __queue_work(dwork->cpu, dwork->wq, &dwork->work); in delayed_work_timer_fn()
1652 struct work_struct *work = &dwork->work; in __queue_delayed_work() local
1657 WARN_ON_ONCE(!list_empty(&work->entry)); in __queue_delayed_work()
1660 * If @delay is 0, queue @dwork->work immediately. This is for in __queue_delayed_work()
1666 __queue_work(cpu, wq, &dwork->work); in __queue_delayed_work()
1681 * queue_delayed_work_on - queue work on specific CPU after delay
1682 * @cpu: CPU number to execute work on
1684 * @dwork: work to queue
1687 * Return: %false if @work was already on a queue, %true otherwise. If
1694 struct work_struct *work = &dwork->work; in queue_delayed_work_on() local
1701 if (!test_and_set_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(work))) { in queue_delayed_work_on()
1712 * mod_delayed_work_on - modify delay of or queue a delayed work on specific CPU
1713 * @cpu: CPU number to execute work on
1715 * @dwork: work to queue
1720 * zero, @work is guaranteed to be scheduled immediately regardless of its
1736 ret = try_to_grab_pending(&dwork->work, true, &flags); in mod_delayed_work_on()
1755 __queue_work(WORK_CPU_UNBOUND, rwork->wq, &rwork->work); in rcu_work_rcufn()
1760 * queue_rcu_work - queue work after a RCU grace period
1762 * @rwork: work to queue
1771 struct work_struct *work = &rwork->work; in queue_rcu_work() local
1773 if (!test_and_set_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(work))) { in queue_rcu_work()
2038 static void send_mayday(struct work_struct *work) in send_mayday() argument
2040 struct pool_workqueue *pwq = get_work_pwq(work); in send_mayday()
2064 struct work_struct *work; in pool_mayday_timeout() local
2076 list_for_each_entry(work, &pool->worklist, entry) in pool_mayday_timeout()
2077 send_mayday(work); in pool_mayday_timeout()
2176 * process_one_work - process single work
2178 * @work: work to process
2180 * Process @work. This function contains all the logics necessary to
2181 * process a single work including synchronization against and
2184 * call this function to process a work.
2189 static void process_one_work(struct worker *worker, struct work_struct *work) in process_one_work() argument
2193 struct pool_workqueue *pwq = get_work_pwq(work); in process_one_work()
2204 * work->lockdep_map, make a copy and use that here. in process_one_work()
2208 lockdep_copy_map(&lockdep_map, &work->lockdep_map); in process_one_work()
2215 * A single work shouldn't be executed concurrently by in process_one_work()
2217 * already processing the work. If so, defer the work to the in process_one_work()
2220 collision = find_worker_executing_work(pool, work); in process_one_work()
2222 move_linked_works(work, &collision->scheduled, NULL); in process_one_work()
2227 debug_work_deactivate(work); in process_one_work()
2228 hash_add(pool->busy_hash, &worker->hentry, (unsigned long)work); in process_one_work()
2229 worker->current_work = work; in process_one_work()
2230 worker->current_func = work->func; in process_one_work()
2232 work_data = *work_data_bits(work); in process_one_work()
2241 list_del_init(&work->entry); in process_one_work()
2247 * execution of the pending work items. in process_one_work()
2256 * pending work items for WORKER_NOT_RUNNING workers such as the in process_one_work()
2264 * update to @work. Also, do this inside @pool->lock so that in process_one_work()
2268 set_work_pool_and_clear_pending(work, pool->id); in process_one_work()
2287 * read-recursive acquire on the work(queue) 'locks', but this will then in process_one_work()
2296 trace_workqueue_execute_start(work); in process_one_work()
2297 worker->current_func(work); in process_one_work()
2299 * While we must be careful to not use "work" after this, the trace in process_one_work()
2302 trace_workqueue_execute_end(work, worker->current_func); in process_one_work()
2317 * kernels, where a requeueing work item waiting for something to in process_one_work()
2318 * happen could deadlock with stop_machine as such work item could in process_one_work()
2348 * may change while processing a work, so this function repeatedly
2349 * fetches a work from the top and executes it.
2358 struct work_struct *work = list_first_entry(&worker->scheduled, in process_scheduled_works() local
2360 process_one_work(worker, work); in process_scheduled_works()
2380 * work items regardless of their specific target workqueue. The only
2381 * exception is work items which belong to workqueues with a rescuer which
2421 * preparing to process a work or actually processing it. in worker_thread()
2436 struct work_struct *work = in worker_thread() local
2442 if (likely(!(*work_data_bits(work) & WORK_STRUCT_LINKED))) { in worker_thread()
2444 process_one_work(worker, work); in worker_thread()
2448 move_linked_works(work, &worker->scheduled, NULL); in worker_thread()
2456 * pool->lock is held and there's no work to process and no need to in worker_thread()
2476 * Regular work processing on a pool may block trying to create a new
2509 * shouldn't have any work pending, but @wq->maydays may still have in rescuer_thread()
2511 * all the work items before the rescuer got to them. Go through in rescuer_thread()
2524 struct work_struct *work, *n; in rescuer_thread() local
2541 list_for_each_entry_safe(work, n, &pool->worklist, entry) { in rescuer_thread()
2542 if (get_work_pwq(work) == pwq) { in rescuer_thread()
2545 move_linked_works(work, scheduled, &n); in rescuer_thread()
2554 * The above execution of rescued work items could in rescuer_thread()
2558 * that such back-to-back work items, which may be in rescuer_thread()
2614 * @target_work: work item being flushed (NULL for workqueue flushes)
2644 struct work_struct work; member
2649 static void wq_barrier_func(struct work_struct *work) in wq_barrier_func() argument
2651 struct wq_barrier *barr = container_of(work, struct wq_barrier, work); in wq_barrier_func()
2656 * insert_wq_barrier - insert a barrier work
2659 * @target: target work to attach @barr to
2668 * try_to_grab_pending() can't determine whether the work to be
2670 * flag of the previous work while there must be a valid next work
2671 * after a work with LINKED flag set.
2693 INIT_WORK_ONSTACK(&barr->work, wq_barrier_func); in insert_wq_barrier()
2694 __set_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(&barr->work)); in insert_wq_barrier()
2700 /* The barrier work item does not participate in pwq->nr_active. */ in insert_wq_barrier()
2723 debug_work_activate(&barr->work); in insert_wq_barrier()
2724 insert_work(pwq, &barr->work, head, work_flags); in insert_wq_barrier()
2731 * @work_color: new work color, < 0 for no-op
2799 * flush_workqueue - ensure that any scheduled work has run to completion.
2802 * This function sleeps until all work items which were queued on entry
2962 * work items on @wq can queue further work items on it. @wq is flushed
3011 static bool start_flush_work(struct work_struct *work, struct wq_barrier *barr, in start_flush_work() argument
3021 pool = get_work_pool(work); in start_flush_work()
3029 pwq = get_work_pwq(work); in start_flush_work()
3034 worker = find_worker_executing_work(pool, work); in start_flush_work()
3040 check_flush_dependency(pwq->wq, work); in start_flush_work()
3042 insert_wq_barrier(pwq, barr, work, worker); in start_flush_work()
3049 * For single threaded workqueues the deadlock happens when the work in start_flush_work()
3050 * is after the work issuing the flush_work(). For rescuer equipped in start_flush_work()
3067 static bool __flush_work(struct work_struct *work, bool from_cancel) in __flush_work() argument
3074 if (WARN_ON(!work->func)) in __flush_work()
3078 lock_map_acquire(&work->lockdep_map); in __flush_work()
3079 lock_map_release(&work->lockdep_map); in __flush_work()
3082 if (start_flush_work(work, &barr, from_cancel)) { in __flush_work()
3084 destroy_work_on_stack(&barr.work); in __flush_work()
3092 * flush_work - wait for a work to finish executing the last queueing instance
3093 * @work: the work to flush
3095 * Wait until @work has finished execution. @work is guaranteed to be idle
3099 * %true if flush_work() waited for the work to finish execution,
3102 bool flush_work(struct work_struct *work) in flush_work() argument
3104 return __flush_work(work, false); in flush_work()
3110 struct work_struct *work; member
3117 if (cwait->work != key) in cwt_wakefn()
3122 static bool __cancel_work_timer(struct work_struct *work, bool is_dwork) in __cancel_work_timer() argument
3129 ret = try_to_grab_pending(work, is_dwork, &flags); in __cancel_work_timer()
3132 * finish. flush_work() doesn't work for PREEMPT_NONE in __cancel_work_timer()
3133 * because we may get scheduled between @work's completion in __cancel_work_timer()
3136 * as @work is no longer busy, try_to_grab_pending() will in __cancel_work_timer()
3137 * return -ENOENT as @work is still being canceled and the in __cancel_work_timer()
3143 * wake function which matches @work along with exclusive in __cancel_work_timer()
3151 cwait.work = work; in __cancel_work_timer()
3155 if (work_is_canceling(work)) in __cancel_work_timer()
3161 /* tell other tasks trying to grab @work to back off */ in __cancel_work_timer()
3162 mark_work_canceling(work); in __cancel_work_timer()
3166 * This allows canceling during early boot. We know that @work in __cancel_work_timer()
3170 __flush_work(work, true); in __cancel_work_timer()
3172 clear_work_data(work); in __cancel_work_timer()
3181 __wake_up(&cancel_waitq, TASK_NORMAL, 1, work); in __cancel_work_timer()
3187 * cancel_work_sync - cancel a work and wait for it to finish
3188 * @work: the work to cancel
3190 * Cancel @work and wait for its execution to finish. This function
3191 * can be used even if the work re-queues itself or migrates to
3192 * another workqueue. On return from this function, @work is
3195 * cancel_work_sync(&delayed_work->work) must not be used for
3198 * The caller must ensure that the workqueue on which @work was last
3202 * %true if @work was pending, %false otherwise.
3204 bool cancel_work_sync(struct work_struct *work) in cancel_work_sync() argument
3206 return __cancel_work_timer(work, false); in cancel_work_sync()
3212 * @dwork: the delayed work to flush
3214 * Delayed timer is cancelled and the pending work is queued for
3219 * %true if flush_work() waited for the work to finish execution,
3226 __queue_work(dwork->cpu, dwork->wq, &dwork->work); in flush_delayed_work()
3228 return flush_work(&dwork->work); in flush_delayed_work()
3234 * @rwork: the rcu work to flush
3237 * %true if flush_rcu_work() waited for the work to finish execution,
3242 if (test_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(&rwork->work))) { in flush_rcu_work()
3244 flush_work(&rwork->work); in flush_rcu_work()
3247 return flush_work(&rwork->work); in flush_rcu_work()
3252 static bool __cancel_work(struct work_struct *work, bool is_dwork) in __cancel_work() argument
3258 ret = try_to_grab_pending(work, is_dwork, &flags); in __cancel_work()
3264 set_work_pool_and_clear_pending(work, get_work_pool_id(work)); in __cancel_work()
3270 * cancel_delayed_work - cancel a delayed work
3279 * The work callback function may still be running on return, unless
3280 * it returns %true and the work doesn't re-arm itself. Explicitly flush or
3287 return __cancel_work(&dwork->work, true); in cancel_delayed_work()
3292 * cancel_delayed_work_sync - cancel a delayed work and wait for it to finish
3293 * @dwork: the delayed work cancel
3302 return __cancel_work_timer(&dwork->work, true); in cancel_delayed_work_sync()
3329 struct work_struct *work = per_cpu_ptr(works, cpu); in schedule_on_each_cpu() local
3331 INIT_WORK(work, func); in schedule_on_each_cpu()
3332 schedule_work_on(cpu, work); in schedule_on_each_cpu()
3346 * @ew: guaranteed storage for the execute work structure (must
3347 * be available when the work executes)
3358 fn(&ew->work); in execute_in_process_context()
3362 INIT_WORK(&ew->work, fn); in execute_in_process_context()
3363 schedule_work(&ew->work); in execute_in_process_context()
3703 static void pwq_unbound_release_workfn(struct work_struct *work) in pwq_unbound_release_workfn() argument
3705 struct pool_workqueue *pwq = container_of(work, struct pool_workqueue, in pwq_unbound_release_workfn()
3746 * workqueue's saved_max_active and activate inactive work items
3785 * let's kick iff work items were activated. in pwq_adjust_max_active()
4094 * possibles CPUs in @attrs->cpumask so that work items are affine to the
4095 * NUMA node it was issued on. Older pwqs are released as in-flight work
4096 * items finish. Note that a work item which repeatedly requeues itself
4135 * already executing the work items for the workqueue will lose their CPU
4138 * affinity, it's the user's responsibility to flush the work item from
4405 * Safely destroy a workqueue. All work currently pending will be done first.
4527 * current_work - retrieve %current task's work struct
4532 * Return: work struct if %current task is a workqueue worker, %NULL otherwise.
4546 * work functions to determine whether it's being run off the rescuer task.
4600 * work_busy - test whether a work is currently pending or running
4601 * @work: the work to be tested
4603 * Test whether @work is currently pending or running. There is no
4610 unsigned int work_busy(struct work_struct *work) in work_busy() argument
4616 if (work_pending(work)) in work_busy()
4620 pool = get_work_pool(work); in work_busy()
4623 if (find_worker_executing_work(pool, work)) in work_busy()
4634 * set_worker_desc - set description for the current work item
4638 * This function can be called by a running work function to describe what
4639 * the work item is about. If the worker task gets dumped, this
4661 * If @task is a worker and currently executing a work item, print out the
4663 * set_worker_desc() by the currently executing work item.
4713 static void pr_cont_work(bool comma, struct work_struct *work) in pr_cont_work() argument
4715 if (work->func == wq_barrier_func) { in pr_cont_work()
4718 barr = container_of(work, struct wq_barrier, work); in pr_cont_work()
4723 pr_cont("%s %ps", comma ? "," : "", work->func); in pr_cont_work()
4730 struct work_struct *work; in show_pwq() local
4760 list_for_each_entry(work, &worker->scheduled, entry) in show_pwq()
4761 pr_cont_work(false, work); in show_pwq()
4767 list_for_each_entry(work, &pool->worklist, entry) { in show_pwq()
4768 if (get_work_pwq(work) == pwq) { in show_pwq()
4777 list_for_each_entry(work, &pool->worklist, entry) { in show_pwq()
4778 if (get_work_pwq(work) != pwq) in show_pwq()
4781 pr_cont_work(comma, work); in show_pwq()
4782 comma = !(*work_data_bits(work) & WORK_STRUCT_LINKED); in show_pwq()
4791 list_for_each_entry(work, &pwq->inactive_works, entry) { in show_pwq()
4792 pr_cont_work(comma, work); in show_pwq()
4793 comma = !(*work_data_bits(work) & WORK_STRUCT_LINKED); in show_pwq()
4836 * drivers that queue work while holding locks in show_workqueue_state()
4862 * queue work while holding locks also taken in their write in show_workqueue_state()
4939 * are a lot of assumptions on strong associations among work, pwq and
5001 * unbound chain execution of currently pending work items. in unbind_workers()
5044 * work. Kick all idle workers so that they migrate to the in rebind_workers()
5164 struct work_struct work; member
5170 static void work_for_cpu_fn(struct work_struct *work) in work_for_cpu_fn() argument
5172 struct work_for_cpu *wfc = container_of(work, struct work_for_cpu, work); in work_for_cpu_fn()
5192 INIT_WORK_ONSTACK(&wfc.work, work_for_cpu_fn); in work_on_cpu()
5193 schedule_work_on(cpu, &wfc.work); in work_on_cpu()
5194 flush_work(&wfc.work); in work_on_cpu()
5195 destroy_work_on_stack(&wfc.work); in work_on_cpu()
5423 * max_active RW int : maximum number of in-flight work items
5792 * flush dependency, a concurrency managed work item which stays RUNNING
5986 * and allows early boot code to create workqueues and queue/cancel work
5987 * items. Actual work item execution starts only after kthreads can be
6064 * Workqueues have been created and work items queued on them, but there
6065 * are no kworkers executing the work items yet. Populate the worker pools