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Message-ID: <4871E67A.1040600@yahoo.it>
Date: Mon, 07 Jul 2008 11:48:42 +0200
From: Filippo Zangheri <filippo.zangheri@yahoo.it>
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To: Felipe Balbi <felipebalbi@users.sourceforge.net>,
       Kernel development list <linux-kernel@vger.kernel.org>,
       linux-acpi@vger.kernel.org
Subject: Re: Battery life difference
References: <31e679430807050617u3fc706fasee9bb43a151c501f@mail.gmail.com> <20080705082352.4b6be669@infradead.org> <31e679430807050844r30ff74fby7e15641573b42d82@mail.gmail.com> <20080706172159.GA12736@x61>
In-Reply-To: <20080706172159.GA12736@x61>
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On 06/07/2008 19:21, Tino Keitel wrote:
> 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:
>=20
> [...]
>=20
>>> Also take a look at
>>> http://kerneltrap.org/mailarchive/linux-kernel/2008/5/8/1771024 becau=
se
>>> these patches save like 0.75W in our lab.
>> cool, is it merged upstream ?
>=20
> 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.

I cannot see this on 2.6.25.9. Is there a particular configuration option=

you must enable, or it just didn't make it to 2.6.25?

Thanks.
Regards.

--=20
Filippo Zangheri

GPG key ID: 0x6C1F2F2F


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