Root/Documentation/scsi/link_power_management_policy.txt

1This parameter allows the user to set the link (interface) power management.
2There are 3 possible options:
3
4Value Effect
5----------------------------------------------------------------------------
6min_power Tell the controller to try to make the link use the
7            least possible power when possible. This may
8            sacrifice some performance due to increased latency
9            when coming out of lower power states.
10
11max_performance Generally, this means no power management. Tell
12            the controller to have performance be a priority
13            over power management.
14
15medium_power Tell the controller to enter a lower power state
16            when possible, but do not enter the lowest power
17            state, thus improving latency over min_power setting.
18
19
20

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