linux-kernel - Re: [PATCH v2] cpufreq: allow powersave governor as the default without expert mode

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <545328ED.20900@intel.com>
Date:	Thu, 30 Oct 2014 23:15:09 -0700
From:	Dirk Brandewie <dirk.brandewie@...il.com>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	James Geboski <jgeboski@...il.com>
CC:	dirk.j.brandewie@...el.com, Viresh Kumar <viresh.kumar@...aro.org>,
	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
	'Dirk Brandewie' <dirk.brandewie@...il.com>
Subject: Re: [PATCH v2] cpufreq: allow powersave governor as the default without
 expert mode

On 10/30/2014 02:18 PM, Rafael J. Wysocki wrote:
> On Thursday, October 16, 2014 07:37:11 AM James Geboski wrote:
>> The intel_pstate driver only supports the performance and the powersave
>> governors. With the performance governor ensuring the highest possible
>> performance settings, userspace tools fail to make any lasting changes.
>> In order to allow userspace tools to make modifications to the settings,
>> the powersave governor must be in use. This makes having the powersave
>> governor as the default convenient for systems where the intel_pstate
>> driver is being employed. Having to enable expert mode in the kernel
>> configuration is just a headache for such a trivial task.
>>
>> This patch applies to all kernel versions 2.6.38 or greater after the
>> migration from CONFIG_EMBEDDED to CONFIG_EXPERT (6a108a14fa35). Most
>> importantly, this applies to kernel versions 3.9 or greater when the
>> intel_pstate driver was introduced.
>>
>> Signed-off-by: James Geboski <jgeboski@...il.com>
>> Acked-by: Viresh Kumar <viresh.kumar@...aro.org>
>
> Dirk, any objections?

No objection.
>
>> ---
>> ChangeLog v2:
>>    - Acked-by: Viresh Kumar <viresh.kumar@...aro.org>
>> ---
>>   drivers/cpufreq/Kconfig | 1 -
>>   1 file changed, 1 deletion(-)
>>
>> diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig
>> index 3489f8f..73df7db 100644
>> --- a/drivers/cpufreq/Kconfig
>> +++ b/drivers/cpufreq/Kconfig
>> @@ -63,7 +63,6 @@ config CPU_FREQ_DEFAULT_GOV_PERFORMANCE
>>
>>   config CPU_FREQ_DEFAULT_GOV_POWERSAVE
>>   	bool "powersave"
>> -	depends on EXPERT
>>   	select CPU_FREQ_GOV_POWERSAVE
>>   	help
>>   	  Use the CPUFreq governor 'powersave' as default. This sets
>>
>

--
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/