linux - What is the relationship between cgroups and rlimit?

Question

Both of these have the function of limiting process resources, but rlimit is two system calls, which seems to be more low-level. Does the implementation of cgroup use rlimit? Or is there no relationship between the two and they are two independent mechanisms?

Answer 1

cgroup is a resource that limits a group of processes, and rlimit is a resource that limits a process or a user. They are two independent mechanisms, which are irrelevant. There seems to be almost no overlap in what they restrict. A process is subject to cgroup Restrictions are also subject to rlimt restrictions. You can refer to: Cgroup overview and man getrlimit