Comment 6 for bug 1584052

Another 24 error-free hours on the server with the test kernel running the MySQL/Icinga2 combination and creating btrfs snapshots every 5 minutes.

I'd like to add that this server, which previously experienced frequent false ENOSPC conditions with the Xenial release kernel, used a fairly plain btrfs configuration at all times:
- The '-o nodatacow' mount option was *not* used (in contrast to the test script).
- Disabling copy-on-write (CoW) on a per-file basis (using chattr +C) was *not* used.

# mount | grep /volumes/01
/dev/sda2 on /volumes/01 type btrfs (rw,noatime,nodiratime,ssd,space_cache,subvolid=5,subvol=/)

# lsattr /var/lib/mysql/ibdata1
---------------- /var/lib/mysql/ibdata1