linux-kernel - [PATCH 34/70] cpufreq: interactive: fix boosting logic

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1445967059-6897-34-git-send-email-czoborbalint@gmail.com>
Date:	Tue, 27 Oct 2015 18:30:22 +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 34/70] cpufreq: interactive: fix boosting logic

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

35a84de cpufreq: interactive: apply above_hispeed_delay to each step above hispeed

caused the speed choice logic to osciallate between boosting and not boosting.
Add back code to ensure speed does not drop below boost frequency while
boosting.

Change-Id: Id420068480fcc7f5c4989ff523e2a8d22e2f4db2
Signed-off-by: Todd Poynor <toddpoynor@...gle.com>
Signed-off-by: Bálint Czobor <czoborbalint@...il.com>
---
 drivers/cpufreq/cpufreq_interactive.c |   15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/cpufreq/cpufreq_interactive.c b/drivers/cpufreq/cpufreq_interactive.c
index 690be16..f8e9ee9 100644
--- a/drivers/cpufreq/cpufreq_interactive.c
+++ b/drivers/cpufreq/cpufreq_interactive.c
@@ -298,11 +298,18 @@ static void cpufreq_interactive_timer(unsigned long data)
 	cpu_load = loadadjfreq / pcpu->target_freq;
 	boosted = boost_val || now < boostpulse_endtime;
 
-	if ((cpu_load >= go_hispeed_load || boosted) &&
-	    pcpu->target_freq < hispeed_freq)
-		new_freq = hispeed_freq;
-	else
+	if (cpu_load >= go_hispeed_load || boosted) {
+		if (pcpu->target_freq < hispeed_freq) {
+			new_freq = hispeed_freq;
+		} else {
+			new_freq = choose_freq(pcpu, loadadjfreq);
+
+			if (new_freq < hispeed_freq)
+				new_freq = hispeed_freq;
+		}
+	} else {
 		new_freq = choose_freq(pcpu, loadadjfreq);
+	}
 
 	if (pcpu->target_freq >= hispeed_freq &&
 	    new_freq > pcpu->target_freq &&
-- 
1.7.9.5

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/