diff options
| author | Yiwei Lin <s921975628@gmail.com> | 2026-01-15 14:53:41 +0800 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2026-01-20 14:58:54 -0700 |
| commit | 20f73d6fc298a22d97286e8fd8529c064d1a33f5 (patch) | |
| tree | 9a8c7a3f4a099615f093217d2be4d51987781f4e | |
| parent | 3c5fefc8f1c87ce5aad32b752abd1c0f4d25a39a (diff) | |
scsi: docs: Add description for missing options of link_power_management_policy
With the kernel update we have more different policy for SCSI
link power management. Add the corresponding description to
the file.
Signed-off-by: Yiwei Lin <s921975628@gmail.com>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260115065341.10230-1-s921975628@gmail.com>
| -rw-r--r-- | Documentation/scsi/link_power_management_policy.rst | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/Documentation/scsi/link_power_management_policy.rst b/Documentation/scsi/link_power_management_policy.rst index 64288dcf10f6..e350892cc2f3 100644 --- a/Documentation/scsi/link_power_management_policy.rst +++ b/Documentation/scsi/link_power_management_policy.rst @@ -5,13 +5,13 @@ Link Power Managent Policy ========================== This parameter allows the user to set the link (interface) power management. -There are 3 possible options: +There are 6 possible options: -===================== ===================================================== +====================== ===================================================== Value Effect -===================== ===================================================== -min_power Tell the controller to try to make the link use the - least possible power when possible. This may +====================== ===================================================== +min_power Enable slumber mode(no partial mode) for the link to + use the least possible power when possible. This may sacrifice some performance due to increased latency when coming out of lower power states. @@ -22,4 +22,15 @@ max_performance Generally, this means no power management. Tell 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. -===================== ===================================================== + +keep_firmware_settings Do not change the current firmware settings for + Power management. This is the default setting. + +med_power_with_dipm Same as medium_power, but additionally with + Device-initiated power management(DIPM) enabled, + as Intel Rapid Storage Technology(IRST) does. + +min_power_with_partial Same as min_power, but additionally with partial + power state enabled, which may improve performance + over min_power setting. +====================== ===================================================== |