Two seconds (In reply to mikhail.v.gavrilov from comment #33)
> Why are you sure what this totally harmless?

Those messages are a sympton and not a cause. E.g. take a look at your logs
again, gnome-shell started to crash before you got the message.

What happens in your case is that some process or the kernels runs away with
memory and because of this you get the message and the crash.

We can disabled the warning message, but fixing the root problem is a complete
different task.