Comment # 14 on bug 1214845 from Chris

(In reply to James Fehlig from comment #11)
> (In reply to Chris from comment #9)
> > How can I check if the memory controller is available? It is only available
> > if I leave the DefaultMemoryAccounting to yes? What about the performance
> > penalties?
> 
> For lxc, the memory controller needs to be available in
> /sys/fs/cgroup/machine.slice/. You can check the 'cgroup.controllers' file
> for controllers available at any point in the cgroup hierarchy. E.g.
> 
> # cat /sys/fs/cgroup/machine.slice/cgroup.controllers 
> memory pids
> 

"cat /sys/fs/cgroup/machine.slice/cgroup.controllers" is showing the same
result when "DefaultMemoryAccounting" is set to "Yes" as when it is set to
"No":

cpu memory pids

I tried what Eric said and it worked with DefaultMemoryAccounting set to "No".
So what we have for now are a few workarounds to avoid the "Unable to find
'memory' cgroups controller" error and I have no clue about the root of what is
wrong.

How could it be marked as solved if any new or old installation has this error?