Hello,

On Mon, Feb 14, 2022 at 07:08:07AM +0100, Paul Menzel wrote:

Dear PPC folks,


On the POWER8 server IBM S822LC running `ppc64_cpu --smt=off` or `ppc64_cpu
--smt=8`, Linux 5.17-rc4 does not log anything. I would have expected a
message about the change in number of processing units.

IIRC it was considered too noisy for systems with many CPUs and the
message was dropped. You can always check the resulting state with
ppc64_cpu or examining sysfs.

Thanks

Michal