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| author | Guilherme G. Piccoli <gpiccoli@igalia.com> | 2024-02-03 16:21:13 +0100 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2024-02-05 18:21:08 +0100 |
| commit | 3e3ede49ce93bc5549d1a1a756410071d6e3a7b1 (patch) | |
| tree | 1d434e8eef35fc786a359c463c663780522b544f | |
| parent | Documentation: coding-style: Fix indentation in code-blocks (diff) | |
| download | linux-3e3ede49ce93bc5549d1a1a756410071d6e3a7b1.tar.xz linux-3e3ede49ce93bc5549d1a1a756410071d6e3a7b1.zip | |
docs: Document possible_cpus parameter
The number of possible CPUs is set be kernel in early boot time through
some discovery mechanisms, like ACPI in x86. We have a parameter both
in x86 and S390 to override that - there are some cases of BIOSes exposing
more possible CPUs than the available ones, so this parameter is a good
testing mechanism, but for some reason wasn't mentioned so far in the
kernel parameters guide - let's fix that.
Cc: Changwoo Min <changwoo@igalia.com>
Signed-off-by: "Guilherme G. Piccoli" <gpiccoli@igalia.com>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20240203152208.1461293-1-gpiccoli@igalia.com
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 31b3a25680d0..e553740190ea 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -4644,6 +4644,11 @@ may be specified. Format: <port>,<port>.... + possible_cpus= [SMP,S390,X86] + Format: <unsigned int> + Set the number of possible CPUs, overriding the + regular discovery mechanisms (such as ACPI/FW, etc). + powersave=off [PPC] This option disables power saving features. It specifically disables cpuidle and sets the platform machine description specific power_save |