where to enable /sys/fs/cgroup/memory/0/memory.usage_in_bytes?

I try to count total memory usage in linux via /sys/fs For this I've found /sys/fs/cgroup/memory/0/memory.usage_in_bytes in https://docs.kernel.org/admin-guide/cgroup-v1/memory.html#user-interface i've enabled CONFIG_CGROUPS and CONFIG_MEMCG options export CONFIG_MEMCG=true export CONFIG_CGROUPS=true Prepared cgroups mount -t tmpfs none /sys/fs/cgroup mkdir /sys/fs/cgroup/memory mount -t cgroup none /sys/fs/cgroup/memory -o memory But doesn't see /sys/fs/cgroup/memory/0/memory.usage_in_bytes in files. Where to enable CONFIG_CGROUPS and CONFIG_MEMCG options to show /sys/fs/cgroup/memory/0/memory.usage_in_bytes? How to enable /sys/fs/cgroup/memory/0/memory.usage_in_bytes OS: Ubuntu 22.04.3 LTS - List item