(In reply to Michael Andres from comment #9) > On my TW > $ cat /proc/592/cgroup > 0::/system.slice/systemd-udevd.service On all of my Tumbleweed and MicroOS systems: man (manpages.o.o):~ # cat /proc/465/cgroup 0::/system.slice/systemd-udevd.service/udev There is always an additional "/udev" at the end, which of course does not match your regex. I don't see this on any SLE15 SP3/SLE15 SP4 systems. So seems to be a change in Factory.