Re: [PATCH] cgroup/cpuset: remove circular dependency deadlock

[Peter Zijlstra]

On Wed, Oct 25, 2017 at 02:09:54PM +0530, Prateek Sood wrote:
> >  void cpuset_update_active_cpus(void)
> >  {
> > +	mutex_lock(&cpuset_mutex);
> > +	rebuild_sched_domains_cpuslocked();
> > +	mutex_unlock(&cpuset_mutex);
> >  }
> 
> In the above patch rebuild_sched_domains_cpuslocked() has been
> used directly. Earlier cpuset_hotplug_update_tasks() was also
> called from cpuset_hotplug_workfn(). So migration of tasks
> related to cgroup which has empty cpuset would not happen
> during cpu hotplug.
> 
> 
> Could you please help in understanding more on this.
> 

That was me being lazy...