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Merge branch 'master' into for-2.6.39

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This commit is contained in:
Tejun Heo
2011-02-21 09:43:56 +01:00
parent 4149efb22d 6f576d57f1
commit 43d133c18b
1051 changed files with 13751 additions and 8137 deletions
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37
kernel/workqueue.c
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@@ -79,7 +79,9 @@ enum {
MAX_IDLE_WORKERS_RATIO = 4, /* 1/4 of busy can be idle */
IDLE_WORKER_TIMEOUT = 300 * HZ, /* keep idle ones for 5 mins */
MAYDAY_INITIAL_TIMEOUT = HZ / 100, /* call for help after 10ms */
MAYDAY_INITIAL_TIMEOUT = HZ / 100 >= 2 ? HZ / 100 : 2,
/* call for help after 10ms
(min two ticks) */
MAYDAY_INTERVAL = HZ / 10, /* and then every 100ms */
CREATE_COOLDOWN = HZ, /* time to breath after fail */
TRUSTEE_COOLDOWN = HZ / 10, /* for trustee draining */
@@ -2049,6 +2051,15 @@ repeat:
move_linked_works(work, scheduled, &n);
process_scheduled_works(rescuer);
/*
* Leave this gcwq. If keep_working() is %true, notify a
* regular worker; otherwise, we end up with 0 concurrency
* and stalling the execution.
*/
if (keep_working(gcwq))
wake_up_worker(gcwq);
spin_unlock_irq(&gcwq->lock);
}
@@ -2958,7 +2969,7 @@ struct workqueue_struct *__alloc_workqueue_key(const char *name,
*/
spin_lock(&workqueue_lock);
if (workqueue_freezing && wq->flags & WQ_FREEZEABLE)
if (workqueue_freezing && wq->flags & WQ_FREEZABLE)
for_each_cwq_cpu(cpu, wq)
get_cwq(cpu, wq)->max_active = 0;
@@ -3070,7 +3081,7 @@ void workqueue_set_max_active(struct workqueue_struct *wq, int max_active)
spin_lock_irq(&gcwq->lock);
if (!(wq->flags & WQ_FREEZEABLE) ||
if (!(wq->flags & WQ_FREEZABLE) ||
!(gcwq->flags & GCWQ_FREEZING))
get_cwq(gcwq->cpu, wq)->max_active = max_active;
@@ -3320,7 +3331,7 @@ static int __cpuinit trustee_thread(void *__gcwq)
* want to get it over with ASAP - spam rescuers, wake up as
* many idlers as necessary and create new ones till the
* worklist is empty. Note that if the gcwq is frozen, there
* may be frozen works in freezeable cwqs. Don't declare
* may be frozen works in freezable cwqs. Don't declare
* completion while frozen.
*/
while (gcwq->nr_workers != gcwq->nr_idle ||
@@ -3578,9 +3589,9 @@ EXPORT_SYMBOL_GPL(work_on_cpu);
/**
* freeze_workqueues_begin - begin freezing workqueues
*
* Start freezing workqueues. After this function returns, all
* freezeable workqueues will queue new works to their frozen_works
* list instead of gcwq->worklist.
* Start freezing workqueues. After this function returns, all freezable
* workqueues will queue new works to their frozen_works list instead of
* gcwq->worklist.
*
* CONTEXT:
* Grabs and releases workqueue_lock and gcwq->lock's.
@@ -3606,7 +3617,7 @@ void freeze_workqueues_begin(void)
list_for_each_entry(wq, &workqueues, list) {
struct cpu_workqueue_struct *cwq = get_cwq(cpu, wq);
if (cwq && wq->flags & WQ_FREEZEABLE)
if (cwq && wq->flags & WQ_FREEZABLE)
cwq->max_active = 0;
}
@@ -3617,7 +3628,7 @@ void freeze_workqueues_begin(void)
}
/**
* freeze_workqueues_busy - are freezeable workqueues still busy?
* freeze_workqueues_busy - are freezable workqueues still busy?
*
* Check whether freezing is complete. This function must be called
* between freeze_workqueues_begin() and thaw_workqueues().
@@ -3626,8 +3637,8 @@ void freeze_workqueues_begin(void)
* Grabs and releases workqueue_lock.
*
* RETURNS:
* %true if some freezeable workqueues are still busy. %false if
* freezing is complete.
* %true if some freezable workqueues are still busy. %false if freezing
* is complete.
*/
bool freeze_workqueues_busy(void)
{
@@ -3647,7 +3658,7 @@ bool freeze_workqueues_busy(void)
list_for_each_entry(wq, &workqueues, list) {
struct cpu_workqueue_struct *cwq = get_cwq(cpu, wq);
if (!cwq || !(wq->flags & WQ_FREEZEABLE))
if (!cwq || !(wq->flags & WQ_FREEZABLE))
continue;
BUG_ON(cwq->nr_active < 0);
@@ -3692,7 +3703,7 @@ void thaw_workqueues(void)
list_for_each_entry(wq, &workqueues, list) {
struct cpu_workqueue_struct *cwq = get_cwq(cpu, wq);
if (!cwq || !(wq->flags & WQ_FREEZEABLE))
if (!cwq || !(wq->flags & WQ_FREEZABLE))
continue;
/* restore max_active and repopulate worklist */