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authorTejun Heo <tj@kernel.org>2011-02-08 10:39:03 +0100
committerTejun Heo <tj@kernel.org>2011-02-09 09:37:49 +0100
commit4149efb22da66e326fc48baf80d628834509f7f0 (patch)
treef55c97e3678eaff010a36b97bcde0e9d2294ccb4
parentc534a107e8fe446202b0fab102abc015c56c0317 (diff)
workqueue: add system_freezeable_wq
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>
-rw-r--r--include/linux/workqueue.h4
-rw-r--r--kernel/workqueue.c6
2 files changed, 9 insertions, 1 deletions
diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h
index 1ac11586a2f..de6a755befa 100644
--- a/include/linux/workqueue.h
+++ b/include/linux/workqueue.h
@@ -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,
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 11869faa681..28f8bd08f0e 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -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);