Re: regression 4.4: deadlock in with cgroup percpu_rwsem

[Tejun Heo]

On Fri, Jan 15, 2016 at 08:30:43AM +0100, Christian Borntraeger wrote:
> On 01/14/2016 08:56 PM, Tejun Heo wrote:
> > Hello,
> > 
> > Thanks a lot for the report and detailed analysis.  Can you please
> > test whether the following patch fixes the issue?
> > 
> > Thanks.
> > 
> 
> 
> Yes, the deadlock is gone and the system is still running.
> After some time I had the following WARN in the logs, though.
> Not sure yet if that is related.

Hmmm... doesn't seem to be related.  I'll spruce up the patch and
route it through cgroup tree w/ stable cc'd.  Please keep me posted on
the lockdep issue.

Thanks!

-- 
tejun