A "kill" button for control groups

The kernel's control-group mechanism exists to partition processes and to provide resource guarantees (and limits) for each. Processes running within a properly configured control group are unable to deprive those running in a different group of their allocated resources (CPU time, memory, I/O bandwidth, etc.), and are equally protected from interference by others. With few exceptions, control groups are not used to take direct actions on processes; Christian Brauner's cgroup.kill patch set is meant to be one of those exceptions.

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