Currently if systemd-oomd doesn't kill anything in a selected cgroup, it selects a new candidate immediately. But if a selected cgroup wasn't killed, it is likely due to it disappearing or getting cleaned up between the time it was selected as a candidate and getting sent SIGKILL(s). We should handle it as though systemd-oomd did perform a kill so that it will check swap/pressure again before it tries to select a new candidate.
System and Service Manager
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