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