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>
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 5ecf498..d80dbdc 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -49,8 +49,6 @@
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 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 @@
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 @@
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 @@
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 @@
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 @@
}
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 @@
} 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 @@
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;
}