} ____cacheline_aligned_in_smp;
/*
- * The per-CPU workqueue. The lower WORK_STRUCT_FLAG_BITS of
- * work_struct->data are used for flags and thus cwqs need to be
- * aligned at two's power of the number of flag bits.
+ * The per-pool workqueue. While queued, the lower WORK_STRUCT_FLAG_BITS
+ * of work_struct->data are used for flags and the remaining high bits
+ * point to the pwq; thus, pwqs need to be aligned at two's power of the
+ * number of flag bits.
*/
-struct cpu_workqueue_struct {
+struct pool_workqueue {
struct worker_pool *pool; /* I: the associated pool */
struct workqueue_struct *wq; /* I: the owning workqueue */
int work_color; /* L: current color */
struct workqueue_struct {
unsigned int flags; /* W: WQ_* flags */
union {
- struct cpu_workqueue_struct __percpu *pcpu;
- struct cpu_workqueue_struct *single;
+ struct pool_workqueue __percpu *pcpu;
+ struct pool_workqueue *single;
unsigned long v;
- } cpu_wq; /* I: cwq's */
+ } pool_wq; /* I: pwq's */
struct list_head list; /* W: list of all workqueues */
struct mutex flush_mutex; /* protects wq flushing */
int work_color; /* F: current work color */
int flush_color; /* F: current flush color */
- atomic_t nr_cwqs_to_flush; /* flush in progress */
+ atomic_t nr_pwqs_to_flush; /* flush in progress */
struct wq_flusher *first_flusher; /* F: first flusher */
struct list_head flusher_queue; /* F: flush waiters */
struct list_head flusher_overflow; /* F: flush overflow list */
struct worker *rescuer; /* I: rescue worker */
int nr_drainers; /* W: drain in progress */
- int saved_max_active; /* W: saved cwq max_active */
+ int saved_max_active; /* W: saved pwq max_active */
#ifdef CONFIG_LOCKDEP
struct lockdep_map lockdep_map;
#endif
return WORK_CPU_END;
}
-static inline int __next_cwq_cpu(int cpu, const struct cpumask *mask,
+static inline int __next_pwq_cpu(int cpu, const struct cpumask *mask,
struct workqueue_struct *wq)
{
return __next_wq_cpu(cpu, mask, !(wq->flags & WQ_UNBOUND) ? 1 : 2);
*
* for_each_wq_cpu() : possible CPUs + WORK_CPU_UNBOUND
* for_each_online_wq_cpu() : online CPUs + WORK_CPU_UNBOUND
- * for_each_cwq_cpu() : possible CPUs for bound workqueues,
+ * for_each_pwq_cpu() : possible CPUs for bound workqueues,
* WORK_CPU_UNBOUND for unbound workqueues
*/
#define for_each_wq_cpu(cpu) \
(cpu) < WORK_CPU_END; \
(cpu) = __next_wq_cpu((cpu), cpu_online_mask, 3))
-#define for_each_cwq_cpu(cpu, wq) \
- for ((cpu) = __next_cwq_cpu(-1, cpu_possible_mask, (wq)); \
+#define for_each_pwq_cpu(cpu, wq) \
+ for ((cpu) = __next_pwq_cpu(-1, cpu_possible_mask, (wq)); \
(cpu) < WORK_CPU_END; \
- (cpu) = __next_cwq_cpu((cpu), cpu_possible_mask, (wq)))
+ (cpu) = __next_pwq_cpu((cpu), cpu_possible_mask, (wq)))
#ifdef CONFIG_DEBUG_OBJECTS_WORK
return &pools[highpri];
}
-static struct cpu_workqueue_struct *get_cwq(unsigned int cpu,
- struct workqueue_struct *wq)
+static struct pool_workqueue *get_pwq(unsigned int cpu,
+ struct workqueue_struct *wq)
{
if (!(wq->flags & WQ_UNBOUND)) {
if (likely(cpu < nr_cpu_ids))
- return per_cpu_ptr(wq->cpu_wq.pcpu, cpu);
+ return per_cpu_ptr(wq->pool_wq.pcpu, cpu);
} else if (likely(cpu == WORK_CPU_UNBOUND))
- return wq->cpu_wq.single;
+ return wq->pool_wq.single;
return NULL;
}
}
/*
- * While queued, %WORK_STRUCT_CWQ is set and non flag bits of a work's data
- * contain the pointer to the queued cwq. Once execution starts, the flag
+ * While queued, %WORK_STRUCT_PWQ is set and non flag bits of a work's data
+ * contain the pointer to the queued pwq. Once execution starts, the flag
* is cleared and the high bits contain OFFQ flags and pool ID.
*
- * set_work_cwq(), set_work_pool_and_clear_pending(), mark_work_canceling()
- * and clear_work_data() can be used to set the cwq, pool or clear
+ * set_work_pwq(), set_work_pool_and_clear_pending(), mark_work_canceling()
+ * and clear_work_data() can be used to set the pwq, pool or clear
* work->data. These functions should only be called while the work is
* owned - ie. while the PENDING bit is set.
*
- * get_work_pool() and get_work_cwq() can be used to obtain the pool or cwq
+ * get_work_pool() and get_work_pwq() can be used to obtain the pool or pwq
* corresponding to a work. Pool is available once the work has been
- * queued anywhere after initialization until it is sync canceled. cwq is
+ * queued anywhere after initialization until it is sync canceled. pwq is
* available only while the work item is queued.
*
* %WORK_OFFQ_CANCELING is used to mark a work item which is being
atomic_long_set(&work->data, data | flags | work_static(work));
}
-static void set_work_cwq(struct work_struct *work,
- struct cpu_workqueue_struct *cwq,
+static void set_work_pwq(struct work_struct *work, struct pool_workqueue *pwq,
unsigned long extra_flags)
{
- set_work_data(work, (unsigned long)cwq,
- WORK_STRUCT_PENDING | WORK_STRUCT_CWQ | extra_flags);
+ set_work_data(work, (unsigned long)pwq,
+ WORK_STRUCT_PENDING | WORK_STRUCT_PWQ | extra_flags);
}
static void set_work_pool_and_keep_pending(struct work_struct *work,
set_work_data(work, WORK_STRUCT_NO_POOL, 0);
}
-static struct cpu_workqueue_struct *get_work_cwq(struct work_struct *work)
+static struct pool_workqueue *get_work_pwq(struct work_struct *work)
{
unsigned long data = atomic_long_read(&work->data);
- if (data & WORK_STRUCT_CWQ)
+ if (data & WORK_STRUCT_PWQ)
return (void *)(data & WORK_STRUCT_WQ_DATA_MASK);
else
return NULL;
struct worker_pool *pool;
int pool_id;
- if (data & WORK_STRUCT_CWQ)
- return ((struct cpu_workqueue_struct *)
+ if (data & WORK_STRUCT_PWQ)
+ return ((struct pool_workqueue *)
(data & WORK_STRUCT_WQ_DATA_MASK))->pool;
pool_id = data >> WORK_OFFQ_POOL_SHIFT;
{
unsigned long data = atomic_long_read(&work->data);
- if (data & WORK_STRUCT_CWQ)
- return ((struct cpu_workqueue_struct *)
+ if (data & WORK_STRUCT_PWQ)
+ return ((struct pool_workqueue *)
(data & WORK_STRUCT_WQ_DATA_MASK))->pool->id;
return data >> WORK_OFFQ_POOL_SHIFT;
{
unsigned long data = atomic_long_read(&work->data);
- return !(data & WORK_STRUCT_CWQ) && (data & WORK_OFFQ_CANCELING);
+ return !(data & WORK_STRUCT_PWQ) && (data & WORK_OFFQ_CANCELING);
}
/*
*nextp = n;
}
-static void cwq_activate_delayed_work(struct work_struct *work)
+static void pwq_activate_delayed_work(struct work_struct *work)
{
- struct cpu_workqueue_struct *cwq = get_work_cwq(work);
+ struct pool_workqueue *pwq = get_work_pwq(work);
trace_workqueue_activate_work(work);
- move_linked_works(work, &cwq->pool->worklist, NULL);
+ move_linked_works(work, &pwq->pool->worklist, NULL);
__clear_bit(WORK_STRUCT_DELAYED_BIT, work_data_bits(work));
- cwq->nr_active++;
+ pwq->nr_active++;
}
-static void cwq_activate_first_delayed(struct cpu_workqueue_struct *cwq)
+static void pwq_activate_first_delayed(struct pool_workqueue *pwq)
{
- struct work_struct *work = list_first_entry(&cwq->delayed_works,
+ struct work_struct *work = list_first_entry(&pwq->delayed_works,
struct work_struct, entry);
- cwq_activate_delayed_work(work);
+ pwq_activate_delayed_work(work);
}
/**
- * cwq_dec_nr_in_flight - decrement cwq's nr_in_flight
- * @cwq: cwq of interest
+ * pwq_dec_nr_in_flight - decrement pwq's nr_in_flight
+ * @pwq: pwq of interest
* @color: color of work which left the queue
*
* A work either has completed or is removed from pending queue,
- * decrement nr_in_flight of its cwq and handle workqueue flushing.
+ * decrement nr_in_flight of its pwq and handle workqueue flushing.
*
* CONTEXT:
* spin_lock_irq(pool->lock).
*/
-static void cwq_dec_nr_in_flight(struct cpu_workqueue_struct *cwq, int color)
+static void pwq_dec_nr_in_flight(struct pool_workqueue *pwq, int color)
{
/* ignore uncolored works */
if (color == WORK_NO_COLOR)
return;
- cwq->nr_in_flight[color]--;
+ pwq->nr_in_flight[color]--;
- cwq->nr_active--;
- if (!list_empty(&cwq->delayed_works)) {
+ pwq->nr_active--;
+ if (!list_empty(&pwq->delayed_works)) {
/* one down, submit a delayed one */
- if (cwq->nr_active < cwq->max_active)
- cwq_activate_first_delayed(cwq);
+ if (pwq->nr_active < pwq->max_active)
+ pwq_activate_first_delayed(pwq);
}
/* is flush in progress and are we at the flushing tip? */
- if (likely(cwq->flush_color != color))
+ if (likely(pwq->flush_color != color))
return;
/* are there still in-flight works? */
- if (cwq->nr_in_flight[color])
+ if (pwq->nr_in_flight[color])
return;
- /* this cwq is done, clear flush_color */
- cwq->flush_color = -1;
+ /* this pwq is done, clear flush_color */
+ pwq->flush_color = -1;
/*
- * If this was the last cwq, wake up the first flusher. It
+ * If this was the last pwq, wake up the first flusher. It
* will handle the rest.
*/
- if (atomic_dec_and_test(&cwq->wq->nr_cwqs_to_flush))
- complete(&cwq->wq->first_flusher->done);
+ if (atomic_dec_and_test(&pwq->wq->nr_pwqs_to_flush))
+ complete(&pwq->wq->first_flusher->done);
}
/**
unsigned long *flags)
{
struct worker_pool *pool;
- struct cpu_workqueue_struct *cwq;
+ struct pool_workqueue *pwq;
local_irq_save(*flags);
spin_lock(&pool->lock);
/*
- * work->data is guaranteed to point to cwq only while the work
- * item is queued on cwq->wq, and both updating work->data to point
- * to cwq on queueing and to pool on dequeueing are done under
- * cwq->pool->lock. This in turn guarantees that, if work->data
- * points to cwq which is associated with a locked pool, the work
+ * work->data is guaranteed to point to pwq only while the work
+ * item is queued on pwq->wq, and both updating work->data to point
+ * to pwq on queueing and to pool on dequeueing are done under
+ * pwq->pool->lock. This in turn guarantees that, if work->data
+ * points to pwq which is associated with a locked pool, the work
* item is currently queued on that pool.
*/
- cwq = get_work_cwq(work);
- if (cwq && cwq->pool == pool) {
+ pwq = get_work_pwq(work);
+ if (pwq && pwq->pool == pool) {
debug_work_deactivate(work);
/*
* A delayed work item cannot be grabbed directly because
* it might have linked NO_COLOR work items which, if left
- * on the delayed_list, will confuse cwq->nr_active
+ * on the delayed_list, will confuse pwq->nr_active
* management later on and cause stall. Make sure the work
* item is activated before grabbing.
*/
if (*work_data_bits(work) & WORK_STRUCT_DELAYED)
- cwq_activate_delayed_work(work);
+ pwq_activate_delayed_work(work);
list_del_init(&work->entry);
- cwq_dec_nr_in_flight(get_work_cwq(work), get_work_color(work));
+ pwq_dec_nr_in_flight(get_work_pwq(work), get_work_color(work));
- /* work->data points to cwq iff queued, point to pool */
+ /* work->data points to pwq iff queued, point to pool */
set_work_pool_and_keep_pending(work, pool->id);
spin_unlock(&pool->lock);
/**
* insert_work - insert a work into a pool
- * @cwq: cwq @work belongs to
+ * @pwq: pwq @work belongs to
* @work: work to insert
* @head: insertion point
* @extra_flags: extra WORK_STRUCT_* flags to set
*
- * Insert @work which belongs to @cwq after @head. @extra_flags is or'd to
+ * Insert @work which belongs to @pwq after @head. @extra_flags is or'd to
* work_struct flags.
*
* CONTEXT:
* spin_lock_irq(pool->lock).
*/
-static void insert_work(struct cpu_workqueue_struct *cwq,
- struct work_struct *work, struct list_head *head,
- unsigned int extra_flags)
+static void insert_work(struct pool_workqueue *pwq, struct work_struct *work,
+ struct list_head *head, unsigned int extra_flags)
{
- struct worker_pool *pool = cwq->pool;
+ struct worker_pool *pool = pwq->pool;
/* we own @work, set data and link */
- set_work_cwq(work, cwq, extra_flags);
+ set_work_pwq(work, pwq, extra_flags);
list_add_tail(&work->entry, head);
/*
* Return %true iff I'm a worker execuing a work item on @wq. If
* I'm @worker, it's safe to dereference it without locking.
*/
- return worker && worker->current_cwq->wq == wq;
+ return worker && worker->current_pwq->wq == wq;
}
static void __queue_work(unsigned int cpu, struct workqueue_struct *wq,
struct work_struct *work)
{
- struct cpu_workqueue_struct *cwq;
+ struct pool_workqueue *pwq;
struct list_head *worklist;
unsigned int work_flags;
unsigned int req_cpu = cpu;
WARN_ON_ONCE(!is_chained_work(wq)))
return;
- /* determine the cwq to use */
+ /* determine the pwq to use */
if (!(wq->flags & WQ_UNBOUND)) {
struct worker_pool *last_pool;
* work needs to be queued on that cpu to guarantee
* non-reentrancy.
*/
- cwq = get_cwq(cpu, wq);
+ pwq = get_pwq(cpu, wq);
last_pool = get_work_pool(work);
- if (last_pool && last_pool != cwq->pool) {
+ if (last_pool && last_pool != pwq->pool) {
struct worker *worker;
spin_lock(&last_pool->lock);
worker = find_worker_executing_work(last_pool, work);
- if (worker && worker->current_cwq->wq == wq) {
- cwq = get_cwq(last_pool->cpu, wq);
+ if (worker && worker->current_pwq->wq == wq) {
+ pwq = get_pwq(last_pool->cpu, wq);
} else {
/* meh... not running there, queue here */
spin_unlock(&last_pool->lock);
- spin_lock(&cwq->pool->lock);
+ spin_lock(&pwq->pool->lock);
}
} else {
- spin_lock(&cwq->pool->lock);
+ spin_lock(&pwq->pool->lock);
}
} else {
- cwq = get_cwq(WORK_CPU_UNBOUND, wq);
- spin_lock(&cwq->pool->lock);
+ pwq = get_pwq(WORK_CPU_UNBOUND, wq);
+ spin_lock(&pwq->pool->lock);
}
- /* cwq determined, queue */
- trace_workqueue_queue_work(req_cpu, cwq, work);
+ /* pwq determined, queue */
+ trace_workqueue_queue_work(req_cpu, pwq, work);
if (WARN_ON(!list_empty(&work->entry))) {
- spin_unlock(&cwq->pool->lock);
+ spin_unlock(&pwq->pool->lock);
return;
}
- cwq->nr_in_flight[cwq->work_color]++;
- work_flags = work_color_to_flags(cwq->work_color);
+ pwq->nr_in_flight[pwq->work_color]++;
+ work_flags = work_color_to_flags(pwq->work_color);
- if (likely(cwq->nr_active < cwq->max_active)) {
+ if (likely(pwq->nr_active < pwq->max_active)) {
trace_workqueue_activate_work(work);
- cwq->nr_active++;
- worklist = &cwq->pool->worklist;
+ pwq->nr_active++;
+ worklist = &pwq->pool->worklist;
} else {
work_flags |= WORK_STRUCT_DELAYED;
- worklist = &cwq->delayed_works;
+ worklist = &pwq->delayed_works;
}
- insert_work(cwq, work, worklist, work_flags);
+ insert_work(pwq, work, worklist, work_flags);
- spin_unlock(&cwq->pool->lock);
+ spin_unlock(&pwq->pool->lock);
}
/**
/*
* wq doesn't really matter but let's keep @worker->pool
- * and @cwq->pool consistent for sanity.
+ * and @pwq->pool consistent for sanity.
*/
if (std_worker_pool_pri(worker->pool))
wq = system_highpri_wq;
else
wq = system_wq;
- insert_work(get_cwq(pool->cpu, wq), rebind_work,
+ insert_work(get_pwq(pool->cpu, wq), rebind_work,
worker->scheduled.next,
work_color_to_flags(WORK_NO_COLOR));
}
static bool send_mayday(struct work_struct *work)
{
- struct cpu_workqueue_struct *cwq = get_work_cwq(work);
- struct workqueue_struct *wq = cwq->wq;
+ struct pool_workqueue *pwq = get_work_pwq(work);
+ struct workqueue_struct *wq = pwq->wq;
unsigned int cpu;
if (!(wq->flags & WQ_RESCUER))
return false;
/* mayday mayday mayday */
- cpu = cwq->pool->cpu;
+ cpu = pwq->pool->cpu;
/* WORK_CPU_UNBOUND can't be set in cpumask, use cpu 0 instead */
if (cpu == WORK_CPU_UNBOUND)
cpu = 0;
__releases(&pool->lock)
__acquires(&pool->lock)
{
- struct cpu_workqueue_struct *cwq = get_work_cwq(work);
+ struct pool_workqueue *pwq = get_work_pwq(work);
struct worker_pool *pool = worker->pool;
- bool cpu_intensive = cwq->wq->flags & WQ_CPU_INTENSIVE;
+ bool cpu_intensive = pwq->wq->flags & WQ_CPU_INTENSIVE;
int work_color;
struct worker *collision;
#ifdef CONFIG_LOCKDEP
hash_add(pool->busy_hash, &worker->hentry, (unsigned long)work);
worker->current_work = work;
worker->current_func = work->func;
- worker->current_cwq = cwq;
+ worker->current_pwq = pwq;
work_color = get_work_color(work);
list_del_init(&work->entry);
spin_unlock_irq(&pool->lock);
- lock_map_acquire_read(&cwq->wq->lockdep_map);
+ lock_map_acquire_read(&pwq->wq->lockdep_map);
lock_map_acquire(&lockdep_map);
trace_workqueue_execute_start(work);
worker->current_func(work);
*/
trace_workqueue_execute_end(work);
lock_map_release(&lockdep_map);
- lock_map_release(&cwq->wq->lockdep_map);
+ lock_map_release(&pwq->wq->lockdep_map);
if (unlikely(in_atomic() || lockdep_depth(current) > 0)) {
pr_err("BUG: workqueue leaked lock or atomic: %s/0x%08x/%d\n"
hash_del(&worker->hentry);
worker->current_work = NULL;
worker->current_func = NULL;
- worker->current_cwq = NULL;
- cwq_dec_nr_in_flight(cwq, work_color);
+ worker->current_pwq = NULL;
+ pwq_dec_nr_in_flight(pwq, work_color);
}
/**
*/
for_each_mayday_cpu(cpu, wq->mayday_mask) {
unsigned int tcpu = is_unbound ? WORK_CPU_UNBOUND : cpu;
- struct cpu_workqueue_struct *cwq = get_cwq(tcpu, wq);
- struct worker_pool *pool = cwq->pool;
+ struct pool_workqueue *pwq = get_pwq(tcpu, wq);
+ struct worker_pool *pool = pwq->pool;
struct work_struct *work, *n;
__set_current_state(TASK_RUNNING);
*/
BUG_ON(!list_empty(&rescuer->scheduled));
list_for_each_entry_safe(work, n, &pool->worklist, entry)
- if (get_work_cwq(work) == cwq)
+ if (get_work_pwq(work) == pwq)
move_linked_works(work, scheduled, &n);
process_scheduled_works(rescuer);
/**
* insert_wq_barrier - insert a barrier work
- * @cwq: cwq to insert barrier into
+ * @pwq: pwq to insert barrier into
* @barr: wq_barrier to insert
* @target: target work to attach @barr to
* @worker: worker currently executing @target, NULL if @target is not executing
* after a work with LINKED flag set.
*
* Note that when @worker is non-NULL, @target may be modified
- * underneath us, so we can't reliably determine cwq from @target.
+ * underneath us, so we can't reliably determine pwq from @target.
*
* CONTEXT:
* spin_lock_irq(pool->lock).
*/
-static void insert_wq_barrier(struct cpu_workqueue_struct *cwq,
+static void insert_wq_barrier(struct pool_workqueue *pwq,
struct wq_barrier *barr,
struct work_struct *target, struct worker *worker)
{
}
debug_work_activate(&barr->work);
- insert_work(cwq, &barr->work, head,
+ insert_work(pwq, &barr->work, head,
work_color_to_flags(WORK_NO_COLOR) | linked);
}
/**
- * flush_workqueue_prep_cwqs - prepare cwqs for workqueue flushing
+ * flush_workqueue_prep_pwqs - prepare pwqs for workqueue flushing
* @wq: workqueue being flushed
* @flush_color: new flush color, < 0 for no-op
* @work_color: new work color, < 0 for no-op
*
- * Prepare cwqs for workqueue flushing.
+ * Prepare pwqs for workqueue flushing.
*
- * If @flush_color is non-negative, flush_color on all cwqs should be
- * -1. If no cwq has in-flight commands at the specified color, all
- * cwq->flush_color's stay at -1 and %false is returned. If any cwq
- * has in flight commands, its cwq->flush_color is set to
- * @flush_color, @wq->nr_cwqs_to_flush is updated accordingly, cwq
+ * If @flush_color is non-negative, flush_color on all pwqs should be
+ * -1. If no pwq has in-flight commands at the specified color, all
+ * pwq->flush_color's stay at -1 and %false is returned. If any pwq
+ * has in flight commands, its pwq->flush_color is set to
+ * @flush_color, @wq->nr_pwqs_to_flush is updated accordingly, pwq
* wakeup logic is armed and %true is returned.
*
* The caller should have initialized @wq->first_flusher prior to
* @flush_color is negative, no flush color update is done and %false
* is returned.
*
- * If @work_color is non-negative, all cwqs should have the same
+ * If @work_color is non-negative, all pwqs should have the same
* work_color which is previous to @work_color and all will be
* advanced to @work_color.
*
* %true if @flush_color >= 0 and there's something to flush. %false
* otherwise.
*/
-static bool flush_workqueue_prep_cwqs(struct workqueue_struct *wq,
+static bool flush_workqueue_prep_pwqs(struct workqueue_struct *wq,
int flush_color, int work_color)
{
bool wait = false;
unsigned int cpu;
if (flush_color >= 0) {
- BUG_ON(atomic_read(&wq->nr_cwqs_to_flush));
- atomic_set(&wq->nr_cwqs_to_flush, 1);
+ BUG_ON(atomic_read(&wq->nr_pwqs_to_flush));
+ atomic_set(&wq->nr_pwqs_to_flush, 1);
}
- for_each_cwq_cpu(cpu, wq) {
- struct cpu_workqueue_struct *cwq = get_cwq(cpu, wq);
- struct worker_pool *pool = cwq->pool;
+ for_each_pwq_cpu(cpu, wq) {
+ struct pool_workqueue *pwq = get_pwq(cpu, wq);
+ struct worker_pool *pool = pwq->pool;
spin_lock_irq(&pool->lock);
if (flush_color >= 0) {
- BUG_ON(cwq->flush_color != -1);
+ BUG_ON(pwq->flush_color != -1);
- if (cwq->nr_in_flight[flush_color]) {
- cwq->flush_color = flush_color;
- atomic_inc(&wq->nr_cwqs_to_flush);
+ if (pwq->nr_in_flight[flush_color]) {
+ pwq->flush_color = flush_color;
+ atomic_inc(&wq->nr_pwqs_to_flush);
wait = true;
}
}
if (work_color >= 0) {
- BUG_ON(work_color != work_next_color(cwq->work_color));
- cwq->work_color = work_color;
+ BUG_ON(work_color != work_next_color(pwq->work_color));
+ pwq->work_color = work_color;
}
spin_unlock_irq(&pool->lock);
}
- if (flush_color >= 0 && atomic_dec_and_test(&wq->nr_cwqs_to_flush))
+ if (flush_color >= 0 && atomic_dec_and_test(&wq->nr_pwqs_to_flush))
complete(&wq->first_flusher->done);
return wait;
wq->first_flusher = &this_flusher;
- if (!flush_workqueue_prep_cwqs(wq, wq->flush_color,
+ if (!flush_workqueue_prep_pwqs(wq, wq->flush_color,
wq->work_color)) {
/* nothing to flush, done */
wq->flush_color = next_color;
/* wait in queue */
BUG_ON(wq->flush_color == this_flusher.flush_color);
list_add_tail(&this_flusher.list, &wq->flusher_queue);
- flush_workqueue_prep_cwqs(wq, -1, wq->work_color);
+ flush_workqueue_prep_pwqs(wq, -1, wq->work_color);
}
} else {
/*
list_splice_tail_init(&wq->flusher_overflow,
&wq->flusher_queue);
- flush_workqueue_prep_cwqs(wq, -1, wq->work_color);
+ flush_workqueue_prep_pwqs(wq, -1, wq->work_color);
}
if (list_empty(&wq->flusher_queue)) {
/*
* Need to flush more colors. Make the next flusher
- * the new first flusher and arm cwqs.
+ * the new first flusher and arm pwqs.
*/
BUG_ON(wq->flush_color == wq->work_color);
BUG_ON(wq->flush_color != next->flush_color);
list_del_init(&next->list);
wq->first_flusher = next;
- if (flush_workqueue_prep_cwqs(wq, wq->flush_color, -1))
+ if (flush_workqueue_prep_pwqs(wq, wq->flush_color, -1))
break;
/*
reflush:
flush_workqueue(wq);
- for_each_cwq_cpu(cpu, wq) {
- struct cpu_workqueue_struct *cwq = get_cwq(cpu, wq);
+ for_each_pwq_cpu(cpu, wq) {
+ struct pool_workqueue *pwq = get_pwq(cpu, wq);
bool drained;
- spin_lock_irq(&cwq->pool->lock);
- drained = !cwq->nr_active && list_empty(&cwq->delayed_works);
- spin_unlock_irq(&cwq->pool->lock);
+ spin_lock_irq(&pwq->pool->lock);
+ drained = !pwq->nr_active && list_empty(&pwq->delayed_works);
+ spin_unlock_irq(&pwq->pool->lock);
if (drained)
continue;
{
struct worker *worker = NULL;
struct worker_pool *pool;
- struct cpu_workqueue_struct *cwq;
+ struct pool_workqueue *pwq;
might_sleep();
pool = get_work_pool(work);
spin_lock_irq(&pool->lock);
/* see the comment in try_to_grab_pending() with the same code */
- cwq = get_work_cwq(work);
- if (cwq) {
- if (unlikely(cwq->pool != pool))
+ pwq = get_work_pwq(work);
+ if (pwq) {
+ if (unlikely(pwq->pool != pool))
goto already_gone;
} else {
worker = find_worker_executing_work(pool, work);
if (!worker)
goto already_gone;
- cwq = worker->current_cwq;
+ pwq = worker->current_pwq;
}
- insert_wq_barrier(cwq, barr, work, worker);
+ insert_wq_barrier(pwq, barr, work, worker);
spin_unlock_irq(&pool->lock);
/*
* flusher is not running on the same workqueue by verifying write
* access.
*/
- if (cwq->wq->saved_max_active == 1 || cwq->wq->flags & WQ_RESCUER)
- lock_map_acquire(&cwq->wq->lockdep_map);
+ if (pwq->wq->saved_max_active == 1 || pwq->wq->flags & WQ_RESCUER)
+ lock_map_acquire(&pwq->wq->lockdep_map);
else
- lock_map_acquire_read(&cwq->wq->lockdep_map);
- lock_map_release(&cwq->wq->lockdep_map);
+ lock_map_acquire_read(&pwq->wq->lockdep_map);
+ lock_map_release(&pwq->wq->lockdep_map);
return true;
already_gone:
return system_wq != NULL;
}
-static int alloc_cwqs(struct workqueue_struct *wq)
+static int alloc_pwqs(struct workqueue_struct *wq)
{
/*
- * cwqs are forced aligned according to WORK_STRUCT_FLAG_BITS.
+ * pwqs are forced aligned according to WORK_STRUCT_FLAG_BITS.
* Make sure that the alignment isn't lower than that of
* unsigned long long.
*/
- const size_t size = sizeof(struct cpu_workqueue_struct);
+ const size_t size = sizeof(struct pool_workqueue);
const size_t align = max_t(size_t, 1 << WORK_STRUCT_FLAG_BITS,
__alignof__(unsigned long long));
if (!(wq->flags & WQ_UNBOUND))
- wq->cpu_wq.pcpu = __alloc_percpu(size, align);
+ wq->pool_wq.pcpu = __alloc_percpu(size, align);
else {
void *ptr;
/*
- * Allocate enough room to align cwq and put an extra
+ * Allocate enough room to align pwq and put an extra
* pointer at the end pointing back to the originally
* allocated pointer which will be used for free.
*/
ptr = kzalloc(size + align + sizeof(void *), GFP_KERNEL);
if (ptr) {
- wq->cpu_wq.single = PTR_ALIGN(ptr, align);
- *(void **)(wq->cpu_wq.single + 1) = ptr;
+ wq->pool_wq.single = PTR_ALIGN(ptr, align);
+ *(void **)(wq->pool_wq.single + 1) = ptr;
}
}
/* just in case, make sure it's actually aligned */
- BUG_ON(!IS_ALIGNED(wq->cpu_wq.v, align));
- return wq->cpu_wq.v ? 0 : -ENOMEM;
+ BUG_ON(!IS_ALIGNED(wq->pool_wq.v, align));
+ return wq->pool_wq.v ? 0 : -ENOMEM;
}
-static void free_cwqs(struct workqueue_struct *wq)
+static void free_pwqs(struct workqueue_struct *wq)
{
if (!(wq->flags & WQ_UNBOUND))
- free_percpu(wq->cpu_wq.pcpu);
- else if (wq->cpu_wq.single) {
- /* the pointer to free is stored right after the cwq */
- kfree(*(void **)(wq->cpu_wq.single + 1));
+ free_percpu(wq->pool_wq.pcpu);
+ else if (wq->pool_wq.single) {
+ /* the pointer to free is stored right after the pwq */
+ kfree(*(void **)(wq->pool_wq.single + 1));
}
}
wq->flags = flags;
wq->saved_max_active = max_active;
mutex_init(&wq->flush_mutex);
- atomic_set(&wq->nr_cwqs_to_flush, 0);
+ atomic_set(&wq->nr_pwqs_to_flush, 0);
INIT_LIST_HEAD(&wq->flusher_queue);
INIT_LIST_HEAD(&wq->flusher_overflow);
lockdep_init_map(&wq->lockdep_map, lock_name, key, 0);
INIT_LIST_HEAD(&wq->list);
- if (alloc_cwqs(wq) < 0)
+ if (alloc_pwqs(wq) < 0)
goto err;
- for_each_cwq_cpu(cpu, wq) {
- struct cpu_workqueue_struct *cwq = get_cwq(cpu, wq);
+ for_each_pwq_cpu(cpu, wq) {
+ struct pool_workqueue *pwq = get_pwq(cpu, wq);
- BUG_ON((unsigned long)cwq & WORK_STRUCT_FLAG_MASK);
- cwq->pool = get_std_worker_pool(cpu, flags & WQ_HIGHPRI);
- cwq->wq = wq;
- cwq->flush_color = -1;
- cwq->max_active = max_active;
- INIT_LIST_HEAD(&cwq->delayed_works);
+ BUG_ON((unsigned long)pwq & WORK_STRUCT_FLAG_MASK);
+ pwq->pool = get_std_worker_pool(cpu, flags & WQ_HIGHPRI);
+ pwq->wq = wq;
+ pwq->flush_color = -1;
+ pwq->max_active = max_active;
+ INIT_LIST_HEAD(&pwq->delayed_works);
}
if (flags & WQ_RESCUER) {
spin_lock(&workqueue_lock);
if (workqueue_freezing && wq->flags & WQ_FREEZABLE)
- for_each_cwq_cpu(cpu, wq)
- get_cwq(cpu, wq)->max_active = 0;
+ for_each_pwq_cpu(cpu, wq)
+ get_pwq(cpu, wq)->max_active = 0;
list_add(&wq->list, &workqueues);
return wq;
err:
if (wq) {
- free_cwqs(wq);
+ free_pwqs(wq);
free_mayday_mask(wq->mayday_mask);
kfree(wq->rescuer);
kfree(wq);
spin_unlock(&workqueue_lock);
/* sanity check */
- for_each_cwq_cpu(cpu, wq) {
- struct cpu_workqueue_struct *cwq = get_cwq(cpu, wq);
+ for_each_pwq_cpu(cpu, wq) {
+ struct pool_workqueue *pwq = get_pwq(cpu, wq);
int i;
for (i = 0; i < WORK_NR_COLORS; i++)
- BUG_ON(cwq->nr_in_flight[i]);
- BUG_ON(cwq->nr_active);
- BUG_ON(!list_empty(&cwq->delayed_works));
+ BUG_ON(pwq->nr_in_flight[i]);
+ BUG_ON(pwq->nr_active);
+ BUG_ON(!list_empty(&pwq->delayed_works));
}
if (wq->flags & WQ_RESCUER) {
kfree(wq->rescuer);
}
- free_cwqs(wq);
+ free_pwqs(wq);
kfree(wq);
}
EXPORT_SYMBOL_GPL(destroy_workqueue);
/**
- * cwq_set_max_active - adjust max_active of a cwq
- * @cwq: target cpu_workqueue_struct
+ * pwq_set_max_active - adjust max_active of a pwq
+ * @pwq: target pool_workqueue
* @max_active: new max_active value.
*
- * Set @cwq->max_active to @max_active and activate delayed works if
+ * Set @pwq->max_active to @max_active and activate delayed works if
* increased.
*
* CONTEXT:
* spin_lock_irq(pool->lock).
*/
-static void cwq_set_max_active(struct cpu_workqueue_struct *cwq, int max_active)
+static void pwq_set_max_active(struct pool_workqueue *pwq, int max_active)
{
- cwq->max_active = max_active;
+ pwq->max_active = max_active;
- while (!list_empty(&cwq->delayed_works) &&
- cwq->nr_active < cwq->max_active)
- cwq_activate_first_delayed(cwq);
+ while (!list_empty(&pwq->delayed_works) &&
+ pwq->nr_active < pwq->max_active)
+ pwq_activate_first_delayed(pwq);
}
/**
wq->saved_max_active = max_active;
- for_each_cwq_cpu(cpu, wq) {
- struct cpu_workqueue_struct *cwq = get_cwq(cpu, wq);
- struct worker_pool *pool = cwq->pool;
+ for_each_pwq_cpu(cpu, wq) {
+ struct pool_workqueue *pwq = get_pwq(cpu, wq);
+ struct worker_pool *pool = pwq->pool;
spin_lock_irq(&pool->lock);
if (!(wq->flags & WQ_FREEZABLE) ||
!(pool->flags & POOL_FREEZING))
- cwq_set_max_active(cwq, max_active);
+ pwq_set_max_active(pwq, max_active);
spin_unlock_irq(&pool->lock);
}
*/
bool workqueue_congested(unsigned int cpu, struct workqueue_struct *wq)
{
- struct cpu_workqueue_struct *cwq = get_cwq(cpu, wq);
+ struct pool_workqueue *pwq = get_pwq(cpu, wq);
- return !list_empty(&cwq->delayed_works);
+ return !list_empty(&pwq->delayed_works);
}
EXPORT_SYMBOL_GPL(workqueue_congested);
* CPU hotplug.
*
* There are two challenges in supporting CPU hotplug. Firstly, there
- * are a lot of assumptions on strong associations among work, cwq and
+ * are a lot of assumptions on strong associations among work, pwq and
* pool which make migrating pending and scheduled works very
* difficult to implement without impacting hot paths. Secondly,
* worker pools serve mix of short, long and very long running works making
pool->flags |= POOL_FREEZING;
list_for_each_entry(wq, &workqueues, list) {
- struct cpu_workqueue_struct *cwq = get_cwq(cpu, wq);
+ struct pool_workqueue *pwq = get_pwq(cpu, wq);
- if (cwq && cwq->pool == pool &&
+ if (pwq && pwq->pool == pool &&
(wq->flags & WQ_FREEZABLE))
- cwq->max_active = 0;
+ pwq->max_active = 0;
}
spin_unlock_irq(&pool->lock);
* to peek without lock.
*/
list_for_each_entry(wq, &workqueues, list) {
- struct cpu_workqueue_struct *cwq = get_cwq(cpu, wq);
+ struct pool_workqueue *pwq = get_pwq(cpu, wq);
- if (!cwq || !(wq->flags & WQ_FREEZABLE))
+ if (!pwq || !(wq->flags & WQ_FREEZABLE))
continue;
- BUG_ON(cwq->nr_active < 0);
- if (cwq->nr_active) {
+ BUG_ON(pwq->nr_active < 0);
+ if (pwq->nr_active) {
busy = true;
goto out_unlock;
}
pool->flags &= ~POOL_FREEZING;
list_for_each_entry(wq, &workqueues, list) {
- struct cpu_workqueue_struct *cwq = get_cwq(cpu, wq);
+ struct pool_workqueue *pwq = get_pwq(cpu, wq);
- if (!cwq || cwq->pool != pool ||
+ if (!pwq || pwq->pool != pool ||
!(wq->flags & WQ_FREEZABLE))
continue;
/* restore max_active and repopulate worklist */
- cwq_set_max_active(cwq, wq->saved_max_active);
+ pwq_set_max_active(pwq, wq->saved_max_active);
}
wake_up_worker(pool);
projects / linux-2.6-microblaze.git / commitdiff