ppc64le: `NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #20!!!` when turning off SMT

Wed Feb 9 00:23:28 AEDT 2022

On Tue, Feb 08, 2022 at 02:17:03PM +0100, Frederic Weisbecker wrote:
> On Tue, Feb 08, 2022 at 08:32:37AM +0100, Paul Menzel wrote:
> > once warned about a NOHZ tick-stop error, when I executed `sudo
> > /usr/sbin/ppc64_cpu --smt=off` (so that KVM would work).
> 
> I see, so I assume this sets some CPUs offline, right?

ppc64_cpu --smt=off sets all but the first CPU per core offline.

PC