[ 3.5.y.z extended stable ] Patch "Fix memory leak in cpufreq stats." has been added to staging queue

Luis Henriques luis.henriques at canonical.com
Tue Mar 12 14:29:17 UTC 2013


This is a note to let you know that I have just added a patch titled

    Fix memory leak in cpufreq stats.

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 37e95cb1af0a3173d85ee89a9802943bb2acd0aa Mon Sep 17 00:00:00 2001
From: "Tu, Xiaobing" <xiaobing.tu at intel.com>
Date: Tue, 23 Oct 2012 01:03:00 +0200
Subject: [PATCH] Fix memory leak in cpufreq stats.

commit e37736777254ce1abc85493a5cacbefe5983b896 upstream.

When system enters sleep, non-boot CPUs will be disabled.
Cpufreq stats sysfs is created when the CPU is up, but it is not
freed when the CPU is going down. This will cause memory leak.

Signed-off-by: xiaobing tu <xiaobing.tu at intel.com>
Signed-off-by: guifang tang <guifang.tang at intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki at intel.com>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/cpufreq/cpufreq_stats.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c
index b40ee14..3998316 100644
--- a/drivers/cpufreq/cpufreq_stats.c
+++ b/drivers/cpufreq/cpufreq_stats.c
@@ -328,6 +328,7 @@ static int __cpuinit cpufreq_stat_cpu_callback(struct notifier_block *nfb,
 		cpufreq_update_policy(cpu);
 		break;
 	case CPU_DOWN_PREPARE:
+	case CPU_DOWN_PREPARE_FROZEN:
 		cpufreq_stats_free_sysfs(cpu);
 		break;
 	case CPU_DEAD:
--
1.8.1.2





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