From: Yiwei Lin Date: Thu, 15 Jan 2026 06:53:41 +0000 (+0800) Subject: scsi: docs: Add description for missing options of link_power_management_policy X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=20f73d6fc298a22d97286e8fd8529c064d1a33f5;p=thirdparty%2Fkernel%2Flinux.git 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 Tested-by: Randy Dunlap Signed-off-by: Jonathan Corbet Message-ID: <20260115065341.10230-1-s921975628@gmail.com> --- diff --git a/Documentation/scsi/link_power_management_policy.rst b/Documentation/scsi/link_power_management_policy.rst index 64288dcf10f68..e350892cc2f3b 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. +====================== =====================================================