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workqueue: fix freezeable workqueues implementation 

Currently ->freezeable is per-cpu, this is wrong. CPU_UP_PREPARE creates
cwq->thread which is not freezeable. Move ->freezeable to workqueue_struct.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Srivatsa Vaddagiri <vatsa@in.ibm.com>
Cc: "Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com>
Cc: Gautham shenoy <ego@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oleg Nesterov 2007-05-09 02:34:06 -07:00 committed by Linus Torvalds
parent 38c3bd96a0
commit 319c2a986e
1 changed files with 9 additions and 9 deletions
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18
kernel/workqueue.c
View File

@ -49,8 +49,6 @@ struct cpu_workqueue_struct {
struct work_struct *current_work;
int run_depth; /* Detect run_workqueue() recursion depth */
int freezeable; /* Freeze the thread during suspend */
} ____cacheline_aligned;
/*
@ -61,6 +59,7 @@ struct workqueue_struct {
struct cpu_workqueue_struct *cpu_wq;
const char *name;
struct list_head list; /* Empty if single thread */
int freezeable; /* Freeze threads during suspend */
};
/* All the per-cpu workqueues on the system, for hotplug cpu to add/remove
@ -351,7 +350,7 @@ static int worker_thread(void *__cwq)
struct k_sigaction sa;
sigset_t blocked;
if (!cwq->freezeable)
if (!cwq->wq->freezeable)
current->flags |= PF_NOFREEZE;
set_user_nice(current, -5);
@ -375,7 +374,7 @@ static int worker_thread(void *__cwq)
set_current_state(TASK_INTERRUPTIBLE);
while (!kthread_should_stop()) {
if (cwq->freezeable)
if (cwq->wq->freezeable)
try_to_freeze();
add_wait_queue(&cwq->more_work, &wait);
@ -546,7 +545,7 @@ out:
EXPORT_SYMBOL_GPL(flush_work);
static struct task_struct *create_workqueue_thread(struct workqueue_struct *wq,
int cpu, int freezeable)
int cpu)
{
struct cpu_workqueue_struct *cwq = per_cpu_ptr(wq->cpu_wq, cpu);
struct task_struct *p;
@ -554,7 +553,6 @@ static struct task_struct *create_workqueue_thread(struct workqueue_struct *wq,
spin_lock_init(&cwq->lock);
cwq->wq = wq;
cwq->thread = NULL;
cwq->freezeable = freezeable;
INIT_LIST_HEAD(&cwq->worklist);
init_waitqueue_head(&cwq->more_work);
@ -586,10 +584,12 @@ struct workqueue_struct *__create_workqueue(const char *name,
}
wq->name = name;
wq->freezeable = freezeable;
mutex_lock(&workqueue_mutex);
if (singlethread) {
INIT_LIST_HEAD(&wq->list);
p = create_workqueue_thread(wq, singlethread_cpu, freezeable);
p = create_workqueue_thread(wq, singlethread_cpu);
if (!p)
destroy = 1;
else
@ -597,7 +597,7 @@ struct workqueue_struct *__create_workqueue(const char *name,
} else {
list_add(&wq->list, &workqueues);
for_each_online_cpu(cpu) {
p = create_workqueue_thread(wq, cpu, freezeable);
p = create_workqueue_thread(wq, cpu);
if (p) {
kthread_bind(p, cpu);
wake_up_process(p);
@ -854,7 +854,7 @@ static int __devinit workqueue_cpu_callback(struct notifier_block *nfb,
mutex_lock(&workqueue_mutex);
/* Create a new workqueue thread for it. */
list_for_each_entry(wq, &workqueues, list) {
if (!create_workqueue_thread(wq, hotcpu, 0)) {
if (!create_workqueue_thread(wq, hotcpu)) {
printk("workqueue for %i failed\n", hotcpu);
return NOTIFY_BAD;
}