linux-kernel - [PATCH 04/70] cpufreq: interactive: set at least hispeed when above hispeed load

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Date:	Tue, 27 Oct 2015 18:29:52 +0100
From:	Bálint Czobor <czoborbalint@...il.com>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
	Todd Poynor <toddpoynor@...gle.com>,
	Bálint Czobor <czoborbalint@...il.com>
Subject: [PATCH 04/70] cpufreq: interactive: set at least hispeed when above hispeed load

From: Todd Poynor <toddpoynor@...gle.com>

If load is above go_hispeed_load, always go to at least hispeed_freq,
even when reducing speed from a higher speed, not just when jumping
up from minimum speed.  Avoids running at a lower than intended
speed after a burst of even higher load.

Change-Id: I5b9d2a15ba25ce609b21bac7c724265cf6838dee
Signed-off-by: Todd Poynor <toddpoynor@...gle.com>
Signed-off-by: Bálint Czobor <czoborbalint@...il.com>
---
 drivers/cpufreq/cpufreq_interactive.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/cpufreq/cpufreq_interactive.c b/drivers/cpufreq/cpufreq_interactive.c
index e3bbe82..12345c7b 100644
--- a/drivers/cpufreq/cpufreq_interactive.c
+++ b/drivers/cpufreq/cpufreq_interactive.c
@@ -166,10 +166,14 @@ static void cpufreq_interactive_timer(unsigned long data)
 		cpu_load = load_since_change;
 
 	if (cpu_load >= go_hispeed_load) {
-		if (pcpu->policy->cur == pcpu->policy->min)
+		if (pcpu->policy->cur == pcpu->policy->min) {
 			new_freq = hispeed_freq;
-		else
+		} else {
 			new_freq = pcpu->policy->max * cpu_load / 100;
+
+			if (new_freq < hispeed_freq)
+				new_freq = hispeed_freq;
+		}
 	} else {
 		new_freq = pcpu->policy->max * cpu_load / 100;
 	}
-- 
1.7.9.5

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