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Implement drain_workqueue() function.

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MFC after:	1 week
Sponsored by:	Mellanox Technologies
This commit is contained in:
Hans Petter Selasky 2015-12-21 12:20:02 +00:00
parent 9782763db2
commit c4e58b4efe
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=292544
2 changed files with 19 additions and 1 deletions
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19
sys/compat/linuxkpi/common/include/linux/workqueue.h
View File

@ -36,10 +36,13 @@
#include <linux/timer.h>
#include <linux/slab.h>
#include <asm/atomic.h>
#include <sys/taskqueue.h>
struct workqueue_struct {
struct taskqueue *taskqueue;
atomic_t draining;
};
struct work_struct {
@ -95,6 +98,9 @@ static inline int
queue_work(struct workqueue_struct *wq, struct work_struct *work)
{
work->taskqueue = wq->taskqueue;
/* Check for draining */
if (atomic_read(&wq->draining) != 0)
return (!work->work_task.ta_pending);
/* Return opposite value to align with Linux logic */
return (!taskqueue_enqueue(wq->taskqueue, &work->work_task));
}
@ -106,7 +112,9 @@ queue_delayed_work(struct workqueue_struct *wq, struct delayed_work *work,
int pending;
work->work.taskqueue = wq->taskqueue;
if (delay != 0) {
if (atomic_read(&wq->draining) != 0) {
pending = work->work.work_task.ta_pending;
} else if (delay != 0) {
pending = work->work.work_task.ta_pending;
callout_reset(&work->timer, delay, linux_delayed_work_fn, work);
} else {
@ -124,6 +132,7 @@ schedule_delayed_work(struct delayed_work *dwork,
struct workqueue_struct wq;
wq.taskqueue = taskqueue_thread;
atomic_set(&wq.draining, 0);
return (queue_delayed_work(&wq, dwork, delay));
}
@ -153,6 +162,14 @@ flush_taskqueue(struct taskqueue *tq)
PRELE(curproc);
}
static inline void
drain_workqueue(struct workqueue_struct *wq)
{
atomic_inc(&wq->draining);
flush_taskqueue(wq->taskqueue);
atomic_dec(&wq->draining);
}
static inline int
cancel_work_sync(struct work_struct *work)
{

1
sys/compat/linuxkpi/common/src/linux_compat.c
View File

@ -945,6 +945,7 @@ linux_create_workqueue_common(const char *name, int cpus)
wq = kmalloc(sizeof(*wq), M_WAITOK);
wq->taskqueue = taskqueue_create(name, M_WAITOK,
taskqueue_thread_enqueue, &wq->taskqueue);
atomic_set(&wq->draining, 0);
taskqueue_start_threads(&wq->taskqueue, cpus, PWAIT, "%s", name);
return (wq);