Re: [PATCH 5/9] sched/hotplug: Consolidate task migration on CPU unplug

[Peter Zijlstra]

On Thu, Oct 01, 2020 at 06:12:30PM +0100, Vincent Donnefort wrote:
> On Mon, Sep 21, 2020 at 06:36:02PM +0200, Peter Zijlstra wrote:
> 
> [...]
> 
> > +
> > +     [CPUHP_AP_SCHED_WAIT_EMPTY] = {
> > +             .name                   = "sched:waitempty",
> > +             .startup.single         = NULL,
> > +             .teardown.single        = sched_cpu_wait_empty,
> > +     },
> > +
> >       /* Handle smpboot threads park/unpark */
> 
> Unless I missed something, now that the wait has its own HP step, this
> patch can probably also get rid of the balance_hotplug_wait() in
> sched_cpu_deactivate() introduced by: 
> 
>   [PATCH 4/9] sched/core: Wait for tasks being pushed away on hotplug

I'd think so. Consider it gone.