I'm trying to convince my new Fedora 31 build to mount a particular subvolume at boot. I have the following subvolumes created:
$ sudo btrfs subvol list /
ID 256 gen 308 top level 5 path root
ID 258 gen 196 top level 5 path home
ID 263 gen 191 top level 5 path @
ID 264 gen 304 top level 5 path @home
/etc/fstab:
UUID=61300ca8-34e9-4e83-a840-de3ae96fa9c5 / btrfs subvolid=263,subvol=@ 0 0
UUID=c2b244ef-ecfb-4c0f-8e6f-5f209dccf482 /boot ext4 defaults 1 2
UUID=61300ca8-34e9-4e83-a840-de3ae96fa9c5 /home btrfs subvolid=264,subvol=@home 0 0
UUID=75205d04-dd23-46d6-aadd-6a99ddb01b6f none swap defaults 0 0
The /home subvolume is mounting correctly, but the / subvolume is not; it always reverts to the initial subvolume that Fedora created at installation:
$ mount | grep btrfs
/dev/vda3 on / type btrfs (rw,relatime,seclabel,space_cache,subvolid=256,subvol=/root)
/dev/vda3 on /home type btrfs (rw,relatime,seclabel,space_cache,subvolid=264,subvol=/@home)
I have tried forcing the default subvolume with sudo btrfs subvol set-default 263 /, but this is also ignored.
