Comment 4 for bug 1328595

As mentioned I already tested with a Kernel from 13.10 with the same result.

To be sure I installed a minimal Ubuntu 13.10 in a virtual machine and did the steps to reproduce the issue.
-> The Problem existed in 13.10 as well.
df@ubuntu-bug-check:~$ cat /etc/issue
Ubuntu 13.10 \n \l
sudo mount -t overlayfs -o lowerdir=/usr,upperdir=/mnt/delta overlayfs /mnt/test
sudo lvcreate -s -n backup -L512M /dev/ubuntu-vg/root
-> Hang
I will attach the dmesg output to this post.

A test using a mainline kernel does not work, because overlayfs is not (yet) in mainline:
df@feretti-virt:~$ uname -r
3.15.0-031500-generic
df@feretti-virt:~$ sudo mount -t overlayfs -o lowerdir=/usr,upperdir=/mnt/delta overlayfs /mnt/test
mount: unknown filesystem type 'overlayfs'

So I will set the tag to 'kernel-unable-to-test-upstream'.
Please change that in case there is a tag better fitting the situation.

Thanks for looking into it.