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| -rw-r--r-- | Documentation/scsi/link_power_management_policy.txt | 19 |
1 files changed, 19 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..d18993d01 --- /dev/null +++ b/Documentation/scsi/link_power_management_policy.txt @@ -0,0 +1,19 @@ +This parameter allows the user to set the link (interface) power management. +There are 3 possible options: + +Value Effect +---------------------------------------------------------------------------- +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. + + |