linux-kernel - Re: [Update PATCH 1/1] Cpufreq: Make governor data on nonboot cpus across system suspend/resume

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: <CAKohpomKqJ-Vb68JvmBdTM-QbrszLH1BLQ14s5H1JzVZBTzpYA@mail.gmail.com>
Date:	Sat, 16 Nov 2013 20:27:07 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:	Lan Tianyu <tianyu.lan@...el.com>,
	"cpufreq@...r.kernel.org" <cpufreq@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [Update PATCH 1/1] Cpufreq: Make governor data on nonboot cpus
 across system suspend/resume

On 16 November 2013 20:11, Rafael J. Wysocki <rjw@...ysocki.net> wrote:
> On Saturday, November 16, 2013 11:59:59 AM Lan Tianyu wrote:

>> Defaultly, all cpus use ondemand governor after bootup. Change one
>> non-boot cpu's governor to conservative,
>
> Well, why would anyone want to do that?  Just out of curiosity ...

People may want to use different group/cluster/socket of CPUs differently,
with different kind of policies. Maybe performance governor for boot cpu
and ondemand for others.

This bug would also be there for big LITTLE where we want to have
separate set of tunables for big and LITTLE clusters for the same type
of governor.

> So this is acpi-cpufreq, right?

Probably yes, I saw something similar somewhere.. But this is driver
independent..

> The patch looks basically OK to me, but ->

We wouldn't need this patch if my other patch (where I am disabling
governors in suspend/resume goes in, in any form)..
--
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/