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Commit 4149efb2 authored by Tejun Heo's avatar Tejun Heo
Browse files

workqueue: add system_freezeable_wq 



Add system wide freezeable workqueue.

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Acked-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
parent c534a107

include/linux/workqueue.h

+4 −0
Original line number Diff line number Diff line
@@ -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,

kernel/workqueue.c

+5 −1
Original line number Diff line number Diff line
@@ -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);