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workqueue: add system_freezeable_wq

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Add system wide freezeable workqueue.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
This commit is contained in:
Tejun Heo 2011-02-08 10:39:03 +01:00
parent c534a107e8
commit 4149efb22d
2 changed files with 9 additions and 1 deletions
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4
include/linux/workqueue.h
View File

@ -286,11 +286,15 @@ enum {
* any specific CPU, not concurrency managed, and all queued works are
* executed immediately as long as max_active limit is not reached and
* resources are available.
*
* system_freezeable_wq is equivalent to system_wq except that it's
* freezeable.
*/
extern struct workqueue_struct *system_wq;
extern struct workqueue_struct *system_long_wq;
extern struct workqueue_struct *system_nrt_wq;
extern struct workqueue_struct *system_unbound_wq;
extern struct workqueue_struct *system_freezeable_wq;
extern struct workqueue_struct *
__alloc_workqueue_key(const char *name, unsigned int flags, int max_active,

6
kernel/workqueue.c
View File

@ -249,10 +249,12 @@ struct workqueue_struct *system_wq __read_mostly;
struct workqueue_struct *system_long_wq __read_mostly;
struct workqueue_struct *system_nrt_wq __read_mostly;
struct workqueue_struct *system_unbound_wq __read_mostly;
struct workqueue_struct *system_freezeable_wq __read_mostly;
EXPORT_SYMBOL_GPL(system_wq);
EXPORT_SYMBOL_GPL(system_long_wq);
EXPORT_SYMBOL_GPL(system_nrt_wq);
EXPORT_SYMBOL_GPL(system_unbound_wq);
EXPORT_SYMBOL_GPL(system_freezeable_wq);
#define CREATE_TRACE_POINTS
#include <trace/events/workqueue.h>
@ -3764,8 +3766,10 @@ static int __init init_workqueues(void)
system_nrt_wq = alloc_workqueue("events_nrt", WQ_NON_REENTRANT, 0);
system_unbound_wq = alloc_workqueue("events_unbound", WQ_UNBOUND,
WQ_UNBOUND_MAX_ACTIVE);
system_freezeable_wq = alloc_workqueue("events_freezeable",
WQ_FREEZEABLE, 0);
BUG_ON(!system_wq || !system_long_wq || !system_nrt_wq ||
!system_unbound_wq);
!system_unbound_wq || !system_freezeable_wq);
return 0;
}
early_initcall(init_workqueues);