subr_taskqueue.c revision 243341
161033Sdfr/*- 261033Sdfr * Copyright (c) 2000 Doug Rabson 361033Sdfr * All rights reserved. 461033Sdfr * 561033Sdfr * Redistribution and use in source and binary forms, with or without 661033Sdfr * modification, are permitted provided that the following conditions 761033Sdfr * are met: 861033Sdfr * 1. Redistributions of source code must retain the above copyright 961033Sdfr * notice, this list of conditions and the following disclaimer. 1061033Sdfr * 2. Redistributions in binary form must reproduce the above copyright 1161033Sdfr * notice, this list of conditions and the following disclaimer in the 1261033Sdfr * documentation and/or other materials provided with the distribution. 1361033Sdfr * 1461033Sdfr * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1561033Sdfr * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1661033Sdfr * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1761033Sdfr * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1861033Sdfr * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1961033Sdfr * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2061033Sdfr * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2161033Sdfr * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2261033Sdfr * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2361033Sdfr * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2461033Sdfr * SUCH DAMAGE. 2561033Sdfr */ 2661033Sdfr 27116182Sobrien#include <sys/cdefs.h> 28116182Sobrien__FBSDID("$FreeBSD: head/sys/kern/subr_taskqueue.c 243341 2012-11-20 15:33:48Z kib $"); 29116182Sobrien 3061033Sdfr#include <sys/param.h> 3185521Sjhb#include <sys/systm.h> 3265822Sjhb#include <sys/bus.h> 3385560Sjhb#include <sys/interrupt.h> 3461033Sdfr#include <sys/kernel.h> 35123614Sjhb#include <sys/kthread.h> 36225570Sadrian#include <sys/limits.h> 3785521Sjhb#include <sys/lock.h> 3861033Sdfr#include <sys/malloc.h> 3985521Sjhb#include <sys/mutex.h> 40145729Ssam#include <sys/proc.h> 41154333Sscottl#include <sys/sched.h> 4285521Sjhb#include <sys/taskqueue.h> 43119708Sken#include <sys/unistd.h> 44154333Sscottl#include <machine/stdarg.h> 4561033Sdfr 4669774Sphkstatic MALLOC_DEFINE(M_TASKQUEUE, "taskqueue", "Task Queues"); 47123614Sjhbstatic void *taskqueue_giant_ih; 48123614Sjhbstatic void *taskqueue_ih; 4967551Sjhb 50213813Smdfstruct taskqueue_busy { 51213813Smdf struct task *tb_running; 52213813Smdf TAILQ_ENTRY(taskqueue_busy) tb_link; 53213813Smdf}; 54213813Smdf 5561033Sdfrstruct taskqueue { 5661033Sdfr STAILQ_HEAD(, task) tq_queue; 5761033Sdfr taskqueue_enqueue_fn tq_enqueue; 5861033Sdfr void *tq_context; 59213813Smdf TAILQ_HEAD(, taskqueue_busy) tq_active; 6085521Sjhb struct mtx tq_mutex; 61178015Ssam struct thread **tq_threads; 62178015Ssam int tq_tcount; 63180588Skmacy int tq_spin; 64154333Sscottl int tq_flags; 65221059Skib int tq_callouts; 6661033Sdfr}; 6761033Sdfr 68154333Sscottl#define TQ_FLAGS_ACTIVE (1 << 0) 69177621Sscottl#define TQ_FLAGS_BLOCKED (1 << 1) 70177621Sscottl#define TQ_FLAGS_PENDING (1 << 2) 71154333Sscottl 72221059Skib#define DT_CALLOUT_ARMED (1 << 0) 73221059Skib 74215021Sjmallett#define TQ_LOCK(tq) \ 75215021Sjmallett do { \ 76215021Sjmallett if ((tq)->tq_spin) \ 77215021Sjmallett mtx_lock_spin(&(tq)->tq_mutex); \ 78215021Sjmallett else \ 79215021Sjmallett mtx_lock(&(tq)->tq_mutex); \ 80215021Sjmallett } while (0) 81154167Sscottl 82215021Sjmallett#define TQ_UNLOCK(tq) \ 83215021Sjmallett do { \ 84215021Sjmallett if ((tq)->tq_spin) \ 85215021Sjmallett mtx_unlock_spin(&(tq)->tq_mutex); \ 86215021Sjmallett else \ 87215021Sjmallett mtx_unlock(&(tq)->tq_mutex); \ 88215021Sjmallett } while (0) 89154167Sscottl 90221059Skibvoid 91221059Skib_timeout_task_init(struct taskqueue *queue, struct timeout_task *timeout_task, 92221059Skib int priority, task_fn_t func, void *context) 93221059Skib{ 94221059Skib 95221059Skib TASK_INIT(&timeout_task->t, priority, func, context); 96221059Skib callout_init_mtx(&timeout_task->c, &queue->tq_mutex, 0); 97221059Skib timeout_task->q = queue; 98221059Skib timeout_task->f = 0; 99221059Skib} 100221059Skib 101154167Sscottlstatic __inline int 102154167SscottlTQ_SLEEP(struct taskqueue *tq, void *p, struct mtx *m, int pri, const char *wm, 103154167Sscottl int t) 104154167Sscottl{ 105180588Skmacy if (tq->tq_spin) 106154167Sscottl return (msleep_spin(p, m, wm, t)); 107154167Sscottl return (msleep(p, m, pri, wm, t)); 108154167Sscottl} 109154167Sscottl 110154167Sscottlstatic struct taskqueue * 111215750Savg_taskqueue_create(const char *name __unused, int mflags, 112145729Ssam taskqueue_enqueue_fn enqueue, void *context, 113154167Sscottl int mtxflags, const char *mtxname) 11461033Sdfr{ 11561033Sdfr struct taskqueue *queue; 116180588Skmacy 11785521Sjhb queue = malloc(sizeof(struct taskqueue), M_TASKQUEUE, mflags | M_ZERO); 11861033Sdfr if (!queue) 119188058Simp return NULL; 120180588Skmacy 12161033Sdfr STAILQ_INIT(&queue->tq_queue); 122213813Smdf TAILQ_INIT(&queue->tq_active); 12361033Sdfr queue->tq_enqueue = enqueue; 12461033Sdfr queue->tq_context = context; 125180588Skmacy queue->tq_spin = (mtxflags & MTX_SPIN) != 0; 126180588Skmacy queue->tq_flags |= TQ_FLAGS_ACTIVE; 127154167Sscottl mtx_init(&queue->tq_mutex, mtxname, NULL, mtxflags); 12861033Sdfr 12961033Sdfr return queue; 13061033Sdfr} 13161033Sdfr 132154167Sscottlstruct taskqueue * 133154167Sscottltaskqueue_create(const char *name, int mflags, 134154333Sscottl taskqueue_enqueue_fn enqueue, void *context) 135154167Sscottl{ 136154333Sscottl return _taskqueue_create(name, mflags, enqueue, context, 137154167Sscottl MTX_DEF, "taskqueue"); 138154167Sscottl} 139154167Sscottl 140145729Ssam/* 141145729Ssam * Signal a taskqueue thread to terminate. 142145729Ssam */ 143145729Ssamstatic void 144178015Ssamtaskqueue_terminate(struct thread **pp, struct taskqueue *tq) 145145729Ssam{ 146145729Ssam 147221059Skib while (tq->tq_tcount > 0 || tq->tq_callouts > 0) { 148154333Sscottl wakeup(tq); 149154333Sscottl TQ_SLEEP(tq, pp, &tq->tq_mutex, PWAIT, "taskqueue_destroy", 0); 150145729Ssam } 151145729Ssam} 152145729Ssam 15361033Sdfrvoid 15461033Sdfrtaskqueue_free(struct taskqueue *queue) 15561033Sdfr{ 15685521Sjhb 157154167Sscottl TQ_LOCK(queue); 158154333Sscottl queue->tq_flags &= ~TQ_FLAGS_ACTIVE; 159178015Ssam taskqueue_terminate(queue->tq_threads, queue); 160213813Smdf KASSERT(TAILQ_EMPTY(&queue->tq_active), ("Tasks still running?")); 161221059Skib KASSERT(queue->tq_callouts == 0, ("Armed timeout tasks")); 16285521Sjhb mtx_destroy(&queue->tq_mutex); 163178015Ssam free(queue->tq_threads, M_TASKQUEUE); 16461033Sdfr free(queue, M_TASKQUEUE); 16561033Sdfr} 16661033Sdfr 167221059Skibstatic int 168221059Skibtaskqueue_enqueue_locked(struct taskqueue *queue, struct task *task) 16961033Sdfr{ 17061033Sdfr struct task *ins; 17161033Sdfr struct task *prev; 17261033Sdfr 17361033Sdfr /* 17461033Sdfr * Count multiple enqueues. 17561033Sdfr */ 176180588Skmacy if (task->ta_pending) { 177225570Sadrian if (task->ta_pending < USHRT_MAX) 178225570Sadrian task->ta_pending++; 179221059Skib return (0); 18061033Sdfr } 18161033Sdfr 18261033Sdfr /* 18361033Sdfr * Optimise the case when all tasks have the same priority. 18461033Sdfr */ 18564199Shsu prev = STAILQ_LAST(&queue->tq_queue, task, ta_link); 18661033Sdfr if (!prev || prev->ta_priority >= task->ta_priority) { 18761033Sdfr STAILQ_INSERT_TAIL(&queue->tq_queue, task, ta_link); 18861033Sdfr } else { 189188058Simp prev = NULL; 19061033Sdfr for (ins = STAILQ_FIRST(&queue->tq_queue); ins; 19161033Sdfr prev = ins, ins = STAILQ_NEXT(ins, ta_link)) 19261033Sdfr if (ins->ta_priority < task->ta_priority) 19361033Sdfr break; 19461033Sdfr 19561033Sdfr if (prev) 19661033Sdfr STAILQ_INSERT_AFTER(&queue->tq_queue, prev, task, ta_link); 19761033Sdfr else 19861033Sdfr STAILQ_INSERT_HEAD(&queue->tq_queue, task, ta_link); 19961033Sdfr } 20061033Sdfr 20161033Sdfr task->ta_pending = 1; 202180588Skmacy if ((queue->tq_flags & TQ_FLAGS_BLOCKED) == 0) 203177621Sscottl queue->tq_enqueue(queue->tq_context); 204180588Skmacy else 205177621Sscottl queue->tq_flags |= TQ_FLAGS_PENDING; 20685560Sjhb 207221059Skib return (0); 208221059Skib} 209221059Skibint 210221059Skibtaskqueue_enqueue(struct taskqueue *queue, struct task *task) 211221059Skib{ 212221059Skib int res; 213221059Skib 214221059Skib TQ_LOCK(queue); 215221059Skib res = taskqueue_enqueue_locked(queue, task); 216154167Sscottl TQ_UNLOCK(queue); 21785560Sjhb 218221059Skib return (res); 21961033Sdfr} 22061033Sdfr 221221059Skibstatic void 222221059Skibtaskqueue_timeout_func(void *arg) 223221059Skib{ 224221059Skib struct taskqueue *queue; 225221059Skib struct timeout_task *timeout_task; 226221059Skib 227221059Skib timeout_task = arg; 228221059Skib queue = timeout_task->q; 229221059Skib KASSERT((timeout_task->f & DT_CALLOUT_ARMED) != 0, ("Stray timeout")); 230221059Skib timeout_task->f &= ~DT_CALLOUT_ARMED; 231221059Skib queue->tq_callouts--; 232221059Skib taskqueue_enqueue_locked(timeout_task->q, &timeout_task->t); 233221059Skib} 234221059Skib 235221059Skibint 236221059Skibtaskqueue_enqueue_timeout(struct taskqueue *queue, 237221059Skib struct timeout_task *timeout_task, int ticks) 238221059Skib{ 239221059Skib int res; 240221059Skib 241221059Skib TQ_LOCK(queue); 242221059Skib KASSERT(timeout_task->q == NULL || timeout_task->q == queue, 243221059Skib ("Migrated queue")); 244221059Skib KASSERT(!queue->tq_spin, ("Timeout for spin-queue")); 245221059Skib timeout_task->q = queue; 246221059Skib res = timeout_task->t.ta_pending; 247221059Skib if (ticks == 0) { 248221059Skib taskqueue_enqueue_locked(queue, &timeout_task->t); 249221059Skib } else { 250221059Skib if ((timeout_task->f & DT_CALLOUT_ARMED) != 0) { 251221059Skib res++; 252221059Skib } else { 253221059Skib queue->tq_callouts++; 254221059Skib timeout_task->f |= DT_CALLOUT_ARMED; 255243341Skib if (ticks < 0) 256243341Skib ticks = -ticks; /* Ignore overflow. */ 257221059Skib } 258243341Skib if (ticks > 0) { 259243341Skib callout_reset(&timeout_task->c, ticks, 260243341Skib taskqueue_timeout_func, timeout_task); 261243341Skib } 262221059Skib } 263221059Skib TQ_UNLOCK(queue); 264221059Skib return (res); 265221059Skib} 266221059Skib 26761033Sdfrvoid 268177621Sscottltaskqueue_block(struct taskqueue *queue) 269177621Sscottl{ 270177621Sscottl 271177621Sscottl TQ_LOCK(queue); 272177621Sscottl queue->tq_flags |= TQ_FLAGS_BLOCKED; 273177621Sscottl TQ_UNLOCK(queue); 274177621Sscottl} 275177621Sscottl 276177621Sscottlvoid 277177621Sscottltaskqueue_unblock(struct taskqueue *queue) 278177621Sscottl{ 279177621Sscottl 280177621Sscottl TQ_LOCK(queue); 281177621Sscottl queue->tq_flags &= ~TQ_FLAGS_BLOCKED; 282177621Sscottl if (queue->tq_flags & TQ_FLAGS_PENDING) { 283177621Sscottl queue->tq_flags &= ~TQ_FLAGS_PENDING; 284177621Sscottl queue->tq_enqueue(queue->tq_context); 285177621Sscottl } 286177621Sscottl TQ_UNLOCK(queue); 287177621Sscottl} 288177621Sscottl 289213813Smdfstatic void 290213813Smdftaskqueue_run_locked(struct taskqueue *queue) 29161033Sdfr{ 292213813Smdf struct taskqueue_busy tb; 293210380Smdf struct task *task; 294210377Smdf int pending; 29561033Sdfr 296210377Smdf mtx_assert(&queue->tq_mutex, MA_OWNED); 297213813Smdf tb.tb_running = NULL; 298213813Smdf TAILQ_INSERT_TAIL(&queue->tq_active, &tb, tb_link); 299213813Smdf 30061033Sdfr while (STAILQ_FIRST(&queue->tq_queue)) { 30161033Sdfr /* 30261033Sdfr * Carefully remove the first task from the queue and 30361033Sdfr * zero its pending count. 30461033Sdfr */ 30561033Sdfr task = STAILQ_FIRST(&queue->tq_queue); 30661033Sdfr STAILQ_REMOVE_HEAD(&queue->tq_queue, ta_link); 30761033Sdfr pending = task->ta_pending; 30861033Sdfr task->ta_pending = 0; 309213813Smdf tb.tb_running = task; 310154167Sscottl TQ_UNLOCK(queue); 31161033Sdfr 31285560Sjhb task->ta_func(task->ta_context, pending); 31361033Sdfr 314154167Sscottl TQ_LOCK(queue); 315213813Smdf tb.tb_running = NULL; 316208715Szml wakeup(task); 31761033Sdfr } 318213813Smdf TAILQ_REMOVE(&queue->tq_active, &tb, tb_link); 31961033Sdfr} 32061033Sdfr 321136131Simpvoid 322213813Smdftaskqueue_run(struct taskqueue *queue) 323213813Smdf{ 324213813Smdf 325213813Smdf TQ_LOCK(queue); 326213813Smdf taskqueue_run_locked(queue); 327213813Smdf TQ_UNLOCK(queue); 328213813Smdf} 329213813Smdf 330213813Smdfstatic int 331213813Smdftask_is_running(struct taskqueue *queue, struct task *task) 332213813Smdf{ 333213813Smdf struct taskqueue_busy *tb; 334213813Smdf 335213813Smdf mtx_assert(&queue->tq_mutex, MA_OWNED); 336213813Smdf TAILQ_FOREACH(tb, &queue->tq_active, tb_link) { 337213813Smdf if (tb->tb_running == task) 338213813Smdf return (1); 339213813Smdf } 340213813Smdf return (0); 341213813Smdf} 342213813Smdf 343221059Skibstatic int 344221059Skibtaskqueue_cancel_locked(struct taskqueue *queue, struct task *task, 345221059Skib u_int *pendp) 346221059Skib{ 347221059Skib 348221059Skib if (task->ta_pending > 0) 349221059Skib STAILQ_REMOVE(&queue->tq_queue, task, task, ta_link); 350221059Skib if (pendp != NULL) 351221059Skib *pendp = task->ta_pending; 352221059Skib task->ta_pending = 0; 353221059Skib return (task_is_running(queue, task) ? EBUSY : 0); 354221059Skib} 355221059Skib 356215011Smdfint 357215011Smdftaskqueue_cancel(struct taskqueue *queue, struct task *task, u_int *pendp) 358215011Smdf{ 359215011Smdf u_int pending; 360215011Smdf int error; 361215011Smdf 362215011Smdf TQ_LOCK(queue); 363221059Skib pending = task->ta_pending; 364221059Skib error = taskqueue_cancel_locked(queue, task, pendp); 365215011Smdf TQ_UNLOCK(queue); 366215011Smdf 367221059Skib return (error); 368221059Skib} 369221059Skib 370221059Skibint 371221059Skibtaskqueue_cancel_timeout(struct taskqueue *queue, 372221059Skib struct timeout_task *timeout_task, u_int *pendp) 373221059Skib{ 374221059Skib u_int pending, pending1; 375221059Skib int error; 376221059Skib 377221059Skib TQ_LOCK(queue); 378221059Skib pending = !!callout_stop(&timeout_task->c); 379221059Skib error = taskqueue_cancel_locked(queue, &timeout_task->t, &pending1); 380221059Skib if ((timeout_task->f & DT_CALLOUT_ARMED) != 0) { 381221059Skib timeout_task->f &= ~DT_CALLOUT_ARMED; 382221059Skib queue->tq_callouts--; 383221059Skib } 384221059Skib TQ_UNLOCK(queue); 385221059Skib 386215011Smdf if (pendp != NULL) 387221059Skib *pendp = pending + pending1; 388215011Smdf return (error); 389215011Smdf} 390215011Smdf 391213813Smdfvoid 392136131Simptaskqueue_drain(struct taskqueue *queue, struct task *task) 393136131Simp{ 394211284Spjd 395211284Spjd if (!queue->tq_spin) 396154167Sscottl WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, __func__); 397145729Ssam 398211284Spjd TQ_LOCK(queue); 399213813Smdf while (task->ta_pending != 0 || task_is_running(queue, task)) 400211284Spjd TQ_SLEEP(queue, task, &queue->tq_mutex, PWAIT, "-", 0); 401211284Spjd TQ_UNLOCK(queue); 402136131Simp} 403136131Simp 404221059Skibvoid 405221059Skibtaskqueue_drain_timeout(struct taskqueue *queue, 406221059Skib struct timeout_task *timeout_task) 407221059Skib{ 408221059Skib 409221059Skib callout_drain(&timeout_task->c); 410221059Skib taskqueue_drain(queue, &timeout_task->t); 411221059Skib} 412221059Skib 41361033Sdfrstatic void 41461033Sdfrtaskqueue_swi_enqueue(void *context) 41561033Sdfr{ 41688900Sjhb swi_sched(taskqueue_ih, 0); 41761033Sdfr} 41861033Sdfr 41961033Sdfrstatic void 42067551Sjhbtaskqueue_swi_run(void *dummy) 42161033Sdfr{ 422213813Smdf taskqueue_run(taskqueue_swi); 42361033Sdfr} 42461033Sdfr 425111528Sscottlstatic void 426111528Sscottltaskqueue_swi_giant_enqueue(void *context) 427111528Sscottl{ 428111528Sscottl swi_sched(taskqueue_giant_ih, 0); 429111528Sscottl} 430111528Sscottl 431111528Sscottlstatic void 432111528Sscottltaskqueue_swi_giant_run(void *dummy) 433111528Sscottl{ 434213813Smdf taskqueue_run(taskqueue_swi_giant); 435111528Sscottl} 436111528Sscottl 437154333Sscottlint 438154333Sscottltaskqueue_start_threads(struct taskqueue **tqp, int count, int pri, 439154333Sscottl const char *name, ...) 440154333Sscottl{ 441154333Sscottl va_list ap; 442178015Ssam struct thread *td; 443154333Sscottl struct taskqueue *tq; 444178015Ssam int i, error; 445198411Sjhb char ktname[MAXCOMLEN + 1]; 446154333Sscottl 447154333Sscottl if (count <= 0) 448154333Sscottl return (EINVAL); 449178015Ssam 450154333Sscottl tq = *tqp; 451154333Sscottl 452154333Sscottl va_start(ap, name); 453198411Sjhb vsnprintf(ktname, sizeof(ktname), name, ap); 454154333Sscottl va_end(ap); 455154333Sscottl 456178015Ssam tq->tq_threads = malloc(sizeof(struct thread *) * count, M_TASKQUEUE, 457157314Ssam M_NOWAIT | M_ZERO); 458178015Ssam if (tq->tq_threads == NULL) { 459157314Ssam printf("%s: no memory for %s threads\n", __func__, ktname); 460157314Ssam return (ENOMEM); 461157314Ssam } 462157314Ssam 463154333Sscottl for (i = 0; i < count; i++) { 464154333Sscottl if (count == 1) 465178015Ssam error = kthread_add(taskqueue_thread_loop, tqp, NULL, 466209062Savg &tq->tq_threads[i], RFSTOPPED, 0, "%s", ktname); 467154333Sscottl else 468178015Ssam error = kthread_add(taskqueue_thread_loop, tqp, NULL, 469178015Ssam &tq->tq_threads[i], RFSTOPPED, 0, 470178015Ssam "%s_%d", ktname, i); 471158904Ssam if (error) { 472157314Ssam /* should be ok to continue, taskqueue_free will dtrt */ 473178015Ssam printf("%s: kthread_add(%s): error %d", __func__, 474178015Ssam ktname, error); 475178015Ssam tq->tq_threads[i] = NULL; /* paranoid */ 476158904Ssam } else 477178015Ssam tq->tq_tcount++; 478154333Sscottl } 479158904Ssam for (i = 0; i < count; i++) { 480178015Ssam if (tq->tq_threads[i] == NULL) 481158904Ssam continue; 482178015Ssam td = tq->tq_threads[i]; 483170307Sjeff thread_lock(td); 484158904Ssam sched_prio(td, pri); 485166188Sjeff sched_add(td, SRQ_BORING); 486170307Sjeff thread_unlock(td); 487158904Ssam } 488154333Sscottl 489154333Sscottl return (0); 490154333Sscottl} 491154333Sscottl 492133305Sjmgvoid 493133305Sjmgtaskqueue_thread_loop(void *arg) 494119708Sken{ 495133305Sjmg struct taskqueue **tqp, *tq; 496131246Sjhb 497133305Sjmg tqp = arg; 498133305Sjmg tq = *tqp; 499154167Sscottl TQ_LOCK(tq); 500188548Sthompsa while ((tq->tq_flags & TQ_FLAGS_ACTIVE) != 0) { 501213813Smdf taskqueue_run_locked(tq); 502196293Spjd /* 503196293Spjd * Because taskqueue_run() can drop tq_mutex, we need to 504196293Spjd * check if the TQ_FLAGS_ACTIVE flag wasn't removed in the 505196293Spjd * meantime, which means we missed a wakeup. 506196293Spjd */ 507196293Spjd if ((tq->tq_flags & TQ_FLAGS_ACTIVE) == 0) 508196293Spjd break; 509157815Sjhb TQ_SLEEP(tq, tq, &tq->tq_mutex, 0, "-", 0); 510188592Sthompsa } 511213813Smdf taskqueue_run_locked(tq); 512145729Ssam 513145729Ssam /* rendezvous with thread that asked us to terminate */ 514178015Ssam tq->tq_tcount--; 515178015Ssam wakeup_one(tq->tq_threads); 516154167Sscottl TQ_UNLOCK(tq); 517178123Sjhb kthread_exit(); 518119708Sken} 519119708Sken 520133305Sjmgvoid 521119708Skentaskqueue_thread_enqueue(void *context) 522119708Sken{ 523133305Sjmg struct taskqueue **tqp, *tq; 524131246Sjhb 525133305Sjmg tqp = context; 526133305Sjmg tq = *tqp; 527133305Sjmg 528133305Sjmg mtx_assert(&tq->tq_mutex, MA_OWNED); 529145729Ssam wakeup_one(tq); 530119708Sken} 531119708Sken 532188058SimpTASKQUEUE_DEFINE(swi, taskqueue_swi_enqueue, NULL, 533111528Sscottl swi_add(NULL, "task queue", taskqueue_swi_run, NULL, SWI_TQ, 534111528Sscottl INTR_MPSAFE, &taskqueue_ih)); 535111528Sscottl 536188058SimpTASKQUEUE_DEFINE(swi_giant, taskqueue_swi_giant_enqueue, NULL, 537151656Sjhb swi_add(NULL, "Giant taskq", taskqueue_swi_giant_run, 538111528Sscottl NULL, SWI_TQ_GIANT, 0, &taskqueue_giant_ih)); 539119708Sken 540133305SjmgTASKQUEUE_DEFINE_THREAD(thread); 541119789Ssam 542154167Sscottlstruct taskqueue * 543154167Sscottltaskqueue_create_fast(const char *name, int mflags, 544154333Sscottl taskqueue_enqueue_fn enqueue, void *context) 545119789Ssam{ 546154333Sscottl return _taskqueue_create(name, mflags, enqueue, context, 547154167Sscottl MTX_SPIN, "fast_taskqueue"); 548119789Ssam} 549119789Ssam 550154167Sscottl/* NB: for backwards compatibility */ 551154167Sscottlint 552154167Sscottltaskqueue_enqueue_fast(struct taskqueue *queue, struct task *task) 553119789Ssam{ 554154167Sscottl return taskqueue_enqueue(queue, task); 555119789Ssam} 556119789Ssam 557119789Ssamstatic void *taskqueue_fast_ih; 558119789Ssam 559119789Ssamstatic void 560154167Sscottltaskqueue_fast_enqueue(void *context) 561119789Ssam{ 562119789Ssam swi_sched(taskqueue_fast_ih, 0); 563119789Ssam} 564119789Ssam 565119789Ssamstatic void 566119789Ssamtaskqueue_fast_run(void *dummy) 567119789Ssam{ 568213813Smdf taskqueue_run(taskqueue_fast); 569119789Ssam} 570119789Ssam 571188058SimpTASKQUEUE_FAST_DEFINE(fast, taskqueue_fast_enqueue, NULL, 572239779Sjhb swi_add(NULL, "fast taskq", taskqueue_fast_run, NULL, 573154167Sscottl SWI_TQ_FAST, INTR_MPSAFE, &taskqueue_fast_ih)); 574196295Spjd 575196295Spjdint 576196295Spjdtaskqueue_member(struct taskqueue *queue, struct thread *td) 577196295Spjd{ 578196295Spjd int i, j, ret = 0; 579196295Spjd 580196295Spjd TQ_LOCK(queue); 581196295Spjd for (i = 0, j = 0; ; i++) { 582196295Spjd if (queue->tq_threads[i] == NULL) 583196295Spjd continue; 584196295Spjd if (queue->tq_threads[i] == td) { 585196295Spjd ret = 1; 586196295Spjd break; 587196295Spjd } 588196295Spjd if (++j >= queue->tq_tcount) 589196295Spjd break; 590196295Spjd } 591196295Spjd TQ_UNLOCK(queue); 592196295Spjd return (ret); 593196295Spjd} 594