You were absolutely correct to be rude.
A pragmatic fix would trigger read-only failure mode at 90% usage of the mount as a whole, with all subvolumes.
A pragmatic fix would trigger read-only failure mode at 90% usage of the mount as a whole, with all subvolumes.
And you know what, that's a great idea.
I have a loopback mount on an fallocate file with a btrfs filesystem inside of it at work. I'm using send/receive to make sure there is hope of recovery.
I wrote this several years ago.
https://www.linuxjournal.com/content/btrfs-centos-living-loo...