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authorViresh Kumar <viresh.kumar@linaro.org>2013-04-24 17:12:54 +0530
committerTejun Heo <tj@kernel.org>2013-05-14 10:50:06 -0700
commit0668106ca3865ba945e155097fb042bf66d364d3 (patch)
treefbd6adfc2ae2f3c2b7fe7ad66d82cd7c64a001fb /kernel/workqueue.c
parentcee22a15052faa817e3ec8985a28154d3fabc7aa (diff)
downloadlinux-0668106ca3865ba945e155097fb042bf66d364d3.tar.bz2
workqueue: Add system wide power_efficient workqueues
This patch adds system wide workqueues aligned towards power saving. This is done by allocating them with WQ_UNBOUND flag if 'wq_power_efficient' is set to 'true'. tj: updated comments a bit. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel/workqueue.c')
-rw-r--r--kernel/workqueue.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 8068d97ce141..16ca2d3dd29f 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -314,6 +314,10 @@ struct workqueue_struct *system_unbound_wq __read_mostly;
EXPORT_SYMBOL_GPL(system_unbound_wq);
struct workqueue_struct *system_freezable_wq __read_mostly;
EXPORT_SYMBOL_GPL(system_freezable_wq);
+struct workqueue_struct *system_power_efficient_wq __read_mostly;
+EXPORT_SYMBOL_GPL(system_power_efficient_wq);
+struct workqueue_struct *system_freezable_power_efficient_wq __read_mostly;
+EXPORT_SYMBOL_GPL(system_freezable_power_efficient_wq);
static int worker_thread(void *__worker);
static void copy_workqueue_attrs(struct workqueue_attrs *to,
@@ -4987,8 +4991,15 @@ static int __init init_workqueues(void)
WQ_UNBOUND_MAX_ACTIVE);
system_freezable_wq = alloc_workqueue("events_freezable",
WQ_FREEZABLE, 0);
+ system_power_efficient_wq = alloc_workqueue("events_power_efficient",
+ WQ_POWER_EFFICIENT, 0);
+ system_freezable_power_efficient_wq = alloc_workqueue("events_freezable_power_efficient",
+ WQ_FREEZABLE | WQ_POWER_EFFICIENT,
+ 0);
BUG_ON(!system_wq || !system_highpri_wq || !system_long_wq ||
- !system_unbound_wq || !system_freezable_wq);
+ !system_unbound_wq || !system_freezable_wq ||
+ !system_power_efficient_wq ||
+ !system_freezable_power_efficient_wq);
return 0;
}
early_initcall(init_workqueues);