linux-kernel - [PATCH] thermal: core: using power_efficient

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Date:   Tue, 4 Sep 2018 15:14:08 +0800
From:   Chunyan Zhang <chunyan.zhang@...soc.com>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>,
        Zhang Rui <rui.zhang@...el.com>,
        Eduardo Valentin <edubezval@...il.com>
CC:     <linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Jeson Gao <jeson.gao@...soc.com>,
        Orson Zhai <orson.zhai@...soc.com>,
        Chunyan Zhang <zhang.lyra@...il.com>,
        Chunyan Zhang <chunyan.zhang@...soc.com>
Subject: [PATCH] thermal: core: using power_efficient_wq for thermal worker

From: Jeson Gao <jeson.gao@...soc.com>

For SMP systems, thermal worker should use power_efficient_wq in power
saving mode, that will make scheduler more flexible on selecting an active
core for running work handler to avoid keeping work handler always
running on a single core, that will save some power.

Even if 'power_efficient_wq' relevant configs are disabled
'system_freezable_power_efficient_wq' is identical to system_freezable_wq,
behavior is unchanged.

Signed-off-by: Jeson Gao <jeson.gao@...soc.com>
Signed-off-by: Chunyan Zhang <chunyan.zhang@...soc.com>
---
 drivers/thermal/thermal_core.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 6ab9823..99df89f 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -290,10 +290,12 @@ 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,
+		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