From: Pavel Machek <pavel@ucw.cz>
To: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Cc: jeff@garzik.org, akpm@linux-foundation.org,
linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org,
James.Bottomley@steeleye.com, edwintorok@gmail.com,
axboe@kernel.dk, linux-scsi@vger.kernel.org
Subject: Re: [patch 2/4] Expose Power Management Policy option to users
Date: Mon, 9 Jul 2007 19:36:04 +0000 [thread overview]
Message-ID: <20070709193603.GA5722@ucw.cz> (raw)
In-Reply-To: <20070705130518.135e4e3c.kristen.c.accardi@intel.com>
Hi!
> This patch will modify the scsi subsystem to allow
> users to set a power management policy for the link.
>
> The scsi subsystem will create a new sysfs file for each
> host in /sys/class/scsi_host called "link_power_management_policy".
> This file can have 3 possible values:
>
> Value Meaning
> -------------------------------------------------------------------
> min_power User wishes the link to conserve power as much as
> possible, even at the cost of some performance
>
> max_performance User wants priority to be on performance, not power
> savings
>
> medium_power User wants power savings, with less performance cost
> than min_power (but less power savings as well).
Has that anything to do with HIPM vs. DIPM?
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2007-07-09 19:36 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20070705194909.337398431@intel.com>
2007-07-05 20:05 ` [patch 1/4] Store interrupt value Kristen Carlson Accardi
2007-08-01 8:18 ` Tejun Heo
2007-08-01 14:01 ` Jeff Garzik
2007-08-01 21:18 ` Kristen Carlson Accardi
2007-07-05 20:05 ` [patch 2/4] Expose Power Management Policy option to users Kristen Carlson Accardi
2007-07-09 19:36 ` Pavel Machek [this message]
2007-07-11 16:51 ` Kristen Carlson Accardi
2007-07-30 16:32 ` Jeff Garzik
2007-07-31 6:27 ` Tejun Heo
2007-07-31 14:16 ` Arjan van de Ven
2007-07-31 14:45 ` Tejun Heo
2007-07-31 16:15 ` Arjan van de Ven
2007-07-31 18:29 ` Tejun Heo
2007-08-01 9:23 ` Tejun Heo
2007-08-01 16:31 ` Kristen Carlson Accardi
2007-08-01 21:16 ` Kristen Carlson Accardi
2007-08-09 16:10 ` Kristen Carlson Accardi
2007-07-31 16:18 ` Kristen Carlson Accardi
2007-07-31 17:48 ` Tejun Heo
2007-07-31 20:24 ` Kristen Carlson Accardi
2007-08-01 3:20 ` Tejun Heo
2007-07-31 14:58 ` Tejun Heo
2007-07-31 14:18 ` James Bottomley
2007-08-01 16:53 ` Matthew Wilcox
2007-08-01 17:06 ` James Bottomley
2007-07-31 16:30 ` Kristen Carlson Accardi
2007-07-31 18:02 ` Tejun Heo
2007-07-31 19:58 ` Kristen Carlson Accardi
2007-08-01 3:24 ` Tejun Heo
2007-08-01 15:52 ` Kristen Carlson Accardi
2007-08-01 21:07 ` Kristen Carlson Accardi
2007-07-05 20:05 ` [patch 3/4] Enable link power management for ata drivers Kristen Carlson Accardi
2007-07-05 22:33 ` Andrew Morton
2007-07-05 22:37 ` Andrew Morton
2007-07-06 0:01 ` Jeff Garzik
2007-07-06 0:02 ` Jeff Garzik
2007-07-06 0:17 ` Andrew Morton
2007-07-06 0:00 ` Jeff Garzik
2007-08-01 8:27 ` Tejun Heo
2007-08-01 9:45 ` edwintorok
2007-08-01 21:11 ` Kristen Carlson Accardi
2007-08-02 5:27 ` Tejun Heo
2007-07-05 20:05 ` [patch 4/4] Enable Aggressive Link Power management for AHCI controllers Kristen Carlson Accardi
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