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Diffstat (limited to 'Documentation/scsi/link_power_management_policy.txt')
-rw-r--r-- | Documentation/scsi/link_power_management_policy.txt | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/Documentation/scsi/link_power_management_policy.txt b/Documentation/scsi/link_power_management_policy.txt new file mode 100644 index 000000000..0285601a6 --- /dev/null +++ b/Documentation/scsi/link_power_management_policy.txt @@ -0,0 +1,22 @@ +This parameter allows the user to set the link (interface) power management. +There are 4 possible options: + +Value Effect +---------------------------------------------------------------------------- +firmware_defaults Inherit configuration from the state programmed by + the firmware during system init. + +min_power Tell the controller to try to make the link use the + least possible power when possible. This may + sacrifice some performance due to increased latency + when coming out of lower power states. + +max_performance Generally, this means no power management. Tell + the controller to have performance be a priority + over power management. + +medium_power Tell the controller to enter a lower power state + when possible, but do not enter the lowest power + state, thus improving latency over min_power setting. + + |