From Fedora Project Wiki
Subvolume creation on a Btrfs filesystem. This feature is a replacement for the previous LVM.
How to test
- In terminal, type btrfs subvolume create Subvolume_Name
- This should create a subvolume that is mounted as a directory within your home folder
- Confirm that directory is a subvolume by running sudo btrfs subvolume list Subvolume_Name