I did a little more testing. root@virt:~# uname -r 3.13.0-32-generic
Actually the hanging seams to happen only when the overlayfs parts are on the logical volume being the snapshot source. Let's say /opt is a logical volume in the volume group virt. Case 1 (hanging): mkdir /opt/test/ cd /opt/test/ mkdir upper lower file_system touch lower/bla.dat mount -t overlayfs -o lowerdir=/opt/test/lower,upperdir=/opt/test/upper overlayfs /opt/test/file_system lvcreate -s -L 5G /dev/virt/opt -n vm_backup -> Hang (see previous posts) Case 2 (not hanging): mkdir /opt/test/ lvcreate -n test -L10G virt mkfs.xfs /dev/virt/test mount /dev/virt/test /opt/test cd /opt/test/ mkdir upper lower file_system touch lower/bla.dat mount -t overlayfs -o lowerdir=/opt/test/lower,upperdir=/opt/test/upper overlayfs /opt/test/file_system lvcreate -s -L 5G /dev/virt/opt -n vm_backup Snapshot created even through the overlayfs is in use (but on a different volume). So the work around for the moment is to use two types of logical volumes : 1 one type for use with overlayfs where one has to make sure that no one ever takes a snapshot of (at least until this bug is fixed.) 2. one type where overlayfs never gets used but where snapshots can be taken from. May be this helps someone running into this issue. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1328595 Title: lvcreate -s hangs when overlayfs is in use To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1328595/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
