linux-kernel - Re: Battery life difference

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: <20080706172159.GA12736@x61>
Date:	Sun, 6 Jul 2008 19:21:59 +0200
From:	Tino Keitel <tino.keitel@....de>
To:	Felipe Balbi <felipebalbi@...rs.sourceforge.net>
Cc:	Kernel development list <linux-kernel@...r.kernel.org>,
	linux-acpi@...r.kernel.org
Subject: Re: Battery life difference

On Sat, Jul 05, 2008 at 18:44:21 +0300, Felipe Balbi wrote:
> Hi,
> 
> On Sat, Jul 5, 2008 at 6:23 PM, Arjan van de Ven <arjan@...radead.org> wrote:

[...]

> > Also take a look at
> > http://kerneltrap.org/mailarchive/linux-kernel/2008/5/8/1771024 because
> > these patches save like 0.75W in our lab.
> 
> cool, is it merged upstream ?

If I got this right, at least Linux 2.6.25 allows to control this via
"/sys/class/scsi_host/host*/link_power_management_policy". Setting it
to "min_power" does the trick. This is also covered by powertop 1.10
and later.

Regards,
Tino
--
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/