Thermal core framework uses the system_freezable_wq workqueue as its
workqueue for polling temperature. Using system_freezable_wq workqueue
prevents the scheduler to make smart decision about the best place to
schedule the work.
This commit replaces system_freezable_wq with
system_freezable_power_efficient_wq. With kernel configuration
CONFIG_WQ_POWER_EFFICIENT is enabled, the work can be scheduled on the
best CPU from a power or a performance point of view.
This commit is inspired by Vincent Guittot patch "netfilter: conntrack:
use power efficient workqueue" and verified on 96boards Hikey960.
Cc: Eduardo Valentin <edubez...@gmail.com>
Cc: Zhang Rui <rui.zh...@intel.com>
Cc: Daniel Lezcano <daniel.lezc...@linaro.org>
Cc: Vincent Guittot <vincent.guit...@linaro.org>
Signed-off-by: Leo Yan <leo....@linaro.org>
---
drivers/thermal/thermal_core.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 2b1b0ba..ba90f71 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -293,11 +293,12 @@ static void thermal_zone_device_set_polling(struct
thermal_zone_device *tz,
int delay)
{
if (delay > 1000)
- mod_delayed_work(system_freezable_wq, &tz->poll_queue,
+ mod_delayed_work(system_freezable_power_efficient_wq,
+ &tz->poll_queue,
round_jiffies(msecs_to_jiffies(delay)));
else if (delay)
- mod_delayed_work(system_freezable_wq, &tz->poll_queue,
- msecs_to_jiffies(delay));
+ mod_delayed_work(system_freezable_power_efficient_wq,
+ &tz->poll_queue, msecs_to_jiffies(delay));
else
cancel_delayed_work(&tz->poll_queue);
}
--
2.7.4
