从一周前开始， journald 不再完成启动。启动时，它启动并记录启动消息和其他一些服务启动日志，然后在启动时突然关闭Switch Root：
Mar 18 05:22:56 playground1.local systemd-journal[96]: Runtime journal is using 8.0M (max allowed 391.1M, trying to leave 586.7M free of 3.8G available ? current limit 391.1M).
Mar 18 05:22:56 playground1.local systemd-journal[96]: Runtime journal is using 8.0M (max allowed 391.1M, trying to leave 586.7M free of 3.8G available ? current limit 391.1M).
Mar 18 05:22:56 playground1.local kernel: Initializing cgroup subsys cpuset
Mar 18 05:22:56 playground1.local kernel: Initializing cgroup subsys cpu
Mar 18 05:22:56 playground1.local kernel: Initializing …