Hi,

I have upgraded all nodes on our computing cluster to 3.11.3 last week
(from 3.10.9) and experience deadlocks in kernel threads connected to
cgroups. They appear sometimes, when our queuing system (slurm 2.6.0) tries
to clean up its cgroups (using freezer, cpuset, memory and devices
subsets). I have attached the associated kernel messages and the cleanup 
script.

Best regards,
Markus