From: Tino Keitel <tino.keitel@gmx.de>
To: Felipe Balbi <felipebalbi@users.sourceforge.net>
Cc: Kernel development list <linux-kernel@vger.kernel.org>,
linux-acpi@vger.kernel.org
Subject: Re: Battery life difference
Date: Sun, 6 Jul 2008 19:21:59 +0200 [thread overview]
Message-ID: <20080706172159.GA12736@x61> (raw)
In-Reply-To: <31e679430807050844r30ff74fby7e15641573b42d82@mail.gmail.com>
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@infradead.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
next prev parent reply other threads:[~2008-07-06 17:54 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-05 13:17 Battery life difference Felipe Balbi
2008-07-05 13:36 ` Theodore Tso
2008-07-05 14:00 ` Felipe Balbi
2008-07-09 20:29 ` Pavel Machek
2008-07-10 5:16 ` Tino Keitel
2008-07-05 15:23 ` Arjan van de Ven
2008-07-05 15:44 ` Felipe Balbi
2008-07-05 15:54 ` Arjan van de Ven
2008-07-05 17:41 ` Felipe Balbi
2008-07-05 19:34 ` Arjan van de Ven
2008-07-05 19:44 ` Felipe Balbi
2008-07-09 20:32 ` Pavel Machek
2008-07-06 17:21 ` Tino Keitel [this message]
2008-07-07 9:48 ` Filippo Zangheri
2008-07-07 21:37 ` Tino Keitel
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