From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- Documentation/scsi/link_power_management_policy.txt | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 Documentation/scsi/link_power_management_policy.txt (limited to 'Documentation/scsi/link_power_management_policy.txt') 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. + + -- cgit v1.2.3