From: Guilherme G. Piccoli Date: Sat, 3 Feb 2024 15:21:13 +0000 (-0300) Subject: docs: Document possible_cpus parameter X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=3e3ede49ce93bc5549d1a1a756410071d6e3a7b1;p=linux.git 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 Signed-off-by: "Guilherme G. Piccoli" Reviewed-by: Randy Dunlap Signed-off-by: Jonathan Corbet Link: https://lore.kernel.org/r/20240203152208.1461293-1-gpiccoli@igalia.com --- diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 31b3a25680d08..e553740190ea4 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -4644,6 +4644,11 @@ may be specified. Format: ,.... + possible_cpus= [SMP,S390,X86] + Format: + 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