lkml.org 
[lkml]   [2007]   [Jun]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [patch 2/3] Expose Power Management Policy option to users
Kristen Carlson Accardi wrote:
> This patch will modify the scsi and ata subsystem to allow
> users to set a power management policy for the link.
> libata drivers can define a function (enable_pm) that will
> perform hardware specific actions to enable whatever power
> management policy the user sets up if the driver supports
> it. This power management policy will be activated after
> all disks have been enumerated and intialized.
>
> 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).
>
>
> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>

seems OK at first glance, though I request that ata and scsi portions be
split into separate patches

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-06-11 22:03    [W:0.062 / U:0.304 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site