cgroups

aka control groups. Allow you to allocate resources like CPU, memory, network bandwidth, into user-defined groups of tasks.

cgroupv2

Usually mounted as a pseudo-filesystem at /sys/fs/cgroup.

Initially, only the root cgroup exists to which all processes belong. A child cgroup can be created by creating a sub-directory: /sys/fs/cgroup/<child_cgroup>

• writing a PID to /sys/fs/cgroup/<child_cgroup>/cgroup.procs adds it to that cgroup
• writing "1" to /sys/fs/cgroup/<child_cgroup>/cgroup.kill will kill the whole cgroup