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T2447: add configurable kernel boot option 'disable-power-saving'

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Lower available CPU C states to a minimum if this option set. This will set
Kernel commandline options "intel_idle.max_cstate=0 processor.max_cstate=1".

(cherry picked from commit f0324d8a03c0c0cd7ed250b722ca4a2aff55f617)
This commit is contained in:
Christian Breunig 2024-03-05 20:32:16 +01:00 committed by Mergify
parent 3f854e2cb3
commit 7943e5513c
1 changed files with 18 additions and 1 deletions
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17
docs/configuration/system/option.rst
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@ -35,6 +35,23 @@ Kernel
Disable all optional CPU mitigations. This improves system performance,
but it may also expose users to several CPU vulnerabilities.
This will add the following option to the Kernel commandline:
* ``mitigations=off``
.. note:: Setting will only become active with the next reboot!
.. cfgcmd:: set system option kernel disable-power-saving
Disable CPU power saving mechanisms also known as C states.
This will add the following two options to the Kernel commandline:
* ``intel_idle.max_cstate=0`` Disable intel_idle and fall back on acpi_idle
* ``processor.max_cstate=1`` Limit processor to maximum C-state 1
.. note:: Setting will only become active with the next reboot!
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