On a Raspberry Pi 4, on a vanilla downloaded 19.10 image of Ubuntu 19 arm64, I failed trying to enable cgroup memory, needed for Kubernetes.
I created (because I don't understand well the real one, I think the 4th)
/boot/cmdline.txt/boot/firmware/cmdline.txt/boot/firmware/btcmd.txt(modified)/boot/firmware/usercfg.txt(modified)
to append:
cgroup_enable=cpuset cgroup_enable=memory cgroup_memory=1
but in vain.
If I check cat /proc/cgroups the cgroup memory is disabled.
If I check cat /proc/cmdline there isn't.
How can I fix that?