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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, Disable all optional CPU mitigations. This improves system performance,
but it may also expose users to several CPU vulnerabilities. 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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