I'm doing zypper up for my TW system:

(4158/7311) Installing: btrfsmaintenance-0.4.2-2.2.noarch
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ps ax | grep btrfsma
21795 pts/7    S+     0:00 rpm --root / --dbpath /var/lib/rpm -U --percent
--noglob --force --nodeps --
/var/cache/zypp/packages/download.opensuse.org-oss/noarch/btrfsmaintenance-0.4.2-2.2.noarch.rpm
21861 pts/7    S+     0:00 /usr/bin/systemctl try-restart
btrfsmaintenance-refresh.service btrfsmaintenance-refresh.path
btrfs-balance.service btrfs-balance.timer btrfs-defrag.service
btrfs-defrag.timer btrfs-scrub.service btrfs-scrub.timer btrfs-trim.service
btrfs-trim.timer