X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=kernel%2Fpower%2FKconfig;h=d444c4e834f4526ec318f71b1076a02c909e34a8;hb=f317ff9eed763e99bd226a447f93d42509434f43;hp=9c39de095ba905558d2f032278f63efa9d3ad081;hpb=13cc56013842a847a0f6ff805d9ed9181e753ef8;p=deliverable%2Flinux.git

diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index 9c39de095ba9..d444c4e834f4 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -262,6 +262,26 @@ config PM_GENERIC_DOMAINS
 	bool
 	depends on PM
 
+config WQ_POWER_EFFICIENT_DEFAULT
+	bool "Enable workqueue power-efficient mode by default"
+	depends on PM
+	default n
+	help
+	  Per-cpu workqueues are generally preferred because they show
+	  better performance thanks to cache locality; unfortunately,
+	  per-cpu workqueues tend to be more power hungry than unbound
+	  workqueues.
+
+	  Enabling workqueue.power_efficient kernel parameter makes the
+	  per-cpu workqueues which were observed to contribute
+	  significantly to power consumption unbound, leading to measurably
+	  lower power usage at the cost of small performance overhead.
+
+	  This config option determines whether workqueue.power_efficient
+	  is enabled by default.
+
+	  If in doubt, say N.
+
 config PM_GENERIC_DOMAINS_SLEEP
 	def_bool y
 	depends on PM_SLEEP && PM_GENERIC_DOMAINS