https://bugzilla.redhat.com/show_bug.cgi?id=1479433
--- Comment #7 from Chris Murphy bugzilla@colorremedies.com --- Try extracting journal files from the btrfs file system using journalctl -d pointed to <mp>/var/log/journal<machineid>/ for the -b-1 and -b-2 boot, use > to output to a file then attach here.
Also useful to include (btrfs commands require root): btrfs fi us <mp> btrfs insp dump-t -r <dev> uname -r btrfs ver
And optionally download the btrfs-debugfs python script file from upstream git: https://github.com/kdave/btrfs-progs
btrfs-debugfs -b <mp>
<mp>=mountpoint path