Re: [PATCH RESEND 1/2] tick/nohz: Fix wrong NOHZ idle CPU state

[Christoph Lameter (Ampere)]

On Thu, 4 Sep 2025, Frederic Weisbecker wrote:

> The current state is indeed broken and some people have already tried to fix it.
> The thing is nohz_full don't want dynamic isolation because it is deemed to run a
> single task. Therefore those tasks must be placed manually in order not to break
> isolation guarantees by accident.
>
> In fact nohz_full doesn't make much sense without isolcpus (or isolated cpuset
> v2 partitions) and I even intend to make nohz_full depend on domain isolation
> in the long term.

I have never used isolcpus with nohz_full. AFAICT isolcpus is depreciated
and cpusets are unnecessary complex overhead.