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| author | Huacai Chen <chenhuacai@loongson.cn> | 2026-02-10 19:31:13 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2026-02-10 19:31:13 +0800 |
| commit | 009ee0c96416ecd0c568af72ee37965e06bde460 (patch) | |
| tree | 361f963199ca7e843c97232f15909d1cd7814126 /Documentation/admin-guide | |
| parent | 94b0c831eda778ae9e4f2164a8b3de485d8977bb (diff) | |
LoongArch: Add HOTPLUG_SMT implementation
For benchmarking or debugging purpose, we usually want to control SMT
via boot parameter and sysfs knobs. So add HOTPLUG_SMT implementation.
1. Boot parameters:
nosmt: Disable SMT, can be enabled via sysfs knobs.
nosmt=force: Disable SMT, cannot be enabled via sysfs knobs.
2. Runtime sysfs controls:
Write "on", "off", "forceoff" or the number of SMT threads (1, 2, ...)
to /sys/devices/system/cpu/smt/control.
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'Documentation/admin-guide')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index aa0031108bc1..674ad1f3bf55 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -4585,7 +4585,7 @@ Kernel parameters nosmt [KNL,MIPS,PPC,EARLY] Disable symmetric multithreading (SMT). Equivalent to smt=1. - [KNL,X86,PPC,S390] Disable symmetric multithreading (SMT). + [KNL,LOONGARCH,X86,PPC,S390] Disable symmetric multithreading (SMT). nosmt=force: Force disable SMT, cannot be undone via the sysfs control file. |