Re: Deadlock due to "cpuset: Make cpuset hotplug synchronous"

[Tejun Heo]

On Wed, Apr 01, 2020 at 10:00:31PM -0400, Qian Cai wrote:
> 
> 
> > On Mar 25, 2020, at 3:19 PM, Tejun Heo <tj@xxxxxxxxxx> wrote:
> > 
> > On Wed, Mar 25, 2020 at 03:16:56PM -0400, Qian Cai wrote:
> >> The linux-next commit a49e4629b5ed (âcpuset: Make cpuset hotplug synchronousâ)
> >> introduced real deadlocks with CPU hotplug as showed in the lockdep splat, since it is
> >> now making a relation from cpu_hotplug_lock â> cgroup_mutex.
> > 
> > Prateek, can you please take a look? Given that the merge window is just around
> > the corner, we might have to revert and retry later if it can't be resolved
> > quickly.
> 
> Tejun, can you back off this commit now given it seems nobody is trying to rescue it?

Yeah, gonna revert it before sending out the pull request.

Thanks.

-- 
tejun