Re: [bisected] "sched: Allow per-cpu kernel threads to run on online && !active" causes warning

[Tejun Heo]

Hello, Heiko.

On Wed, Aug 17, 2016 at 12:19:53AM +0200, Heiko Carstens wrote:
> I think the easiest solution would be to simply assign all cpus, for which
> we do not have any topology information, to an arbitrary node; e.g. round
> robin.
> 
> After all the case that cpus are added later is rare and the s390 fake numa
> implementation does not know about the memory topology. All it is doing is

Ah, okay, so there really is no requirement for a newly coming up cpu
to be on a specific node.

> distributing the memory to several nodes in order to avoid a single huge
> node. So that should be sort of ok.

Sounds good to me.  If that's the only purpose, we don't lose much by
round-robining the possible CPUs on boot and sticking with the
mapping.

Thanks.

-- 
tejun