Re: [PATCH] selftests/cpu-hotplug: Fix check for cpu hotplug not supported

Shuah Khan
2026-03-31T22:09:03Z

On 3/19/26 09:38, Dmytro Maluka wrote:
> If CONFIG_HOTPLUG_CPU is disabled, /sys/devices/system/cpu/cpu*
> directories are still populated, so the test fails to correctly detect
> that CPU hotplug is not supported.
>
> Fix this by checking for the presence of 'online' files in those
> directories instead. The 'online' node is created for the given CPU if
> and only if this CPU supports hotplug. So if none of the CPUs have
> 'online' nodes, it means CPU hotplug is not supported.
>
> Signed-off-by: Dmytro Maluka <dmaluka@chromium.org>
> ---

Applied to linux_kselftest next for Linux 7.1-rc1.

thanks,
-- Shuah