Current we get two version runtime in containerd, runtime v1 and v2, v2 also has two version, name them as v2-v1 and v2-v2.

Although runtime v1 will be deprecated, but it still need some time, I want say that many code in two version runtime is repeat, like shim reaper part, runtime/v1/shim/reaper.go runtime/v2/shim/reaper_unix.go, they two just named different. And runtime v2 calls proc code locate in v1, github.com/containerd/containerd/runtime/v1/linux/proc, it may can be move to some common part.

This is what I thought, I wonder if it is worth to do something, 😕