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git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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>
authored by
Yiwei Lin
and committed by
Jonathan Corbet
20f73d6f
3c5fefc8
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Documentation/scsi/link_power_management_policy.rst
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Documentation/scsi/link_power_management_policy.rst
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==========================
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This parameter allows the user to set the link (interface) power management.
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There are 3 possible options:
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There are 6 possible options:
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===================== =====================================================
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====================== =====================================================
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Value Effect
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===================== =====================================================
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min_power Tell the controller to try to make the link use the
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least possible power when possible. This may
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====================== =====================================================
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min_power Enable slumber mode(no partial mode) for the link to
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use the least possible power when possible. This may
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sacrifice some performance due to increased latency
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when coming out of lower power states.
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···
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medium_power Tell the controller to enter a lower power state
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when possible, but do not enter the lowest power
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state, thus improving latency over min_power setting.
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===================== =====================================================
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keep_firmware_settings Do not change the current firmware settings for
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Power management. This is the default setting.
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med_power_with_dipm Same as medium_power, but additionally with
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Device-initiated power management(DIPM) enabled,
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as Intel Rapid Storage Technology(IRST) does.
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min_power_with_partial Same as min_power, but additionally with partial
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power state enabled, which may improve performance
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over min_power setting.
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====================== =====================================================