# systemd-analyze blame
40.256s firewalld.service
38.154s initial-setup-graphical.service
26.161s dev-mapper-VolGroup\x2dlv_root.device
24.262s abrtd.service
24.118s systemd-udev-settle.service
20.907s systemd-journal-flush.service
17.716s accounts-daemon.service
16.398s libvirtd.service
11.097s systemd-udevd.service
10.533s systemd-journald.service
10.389s systemd-sysctl.service
10.266s dnf-makecache.service
4.412s polkit.service
4.404s jexec.service
3.767s lvm2-monitor.service
3.439s chronyd.service
3.300s systemd-logind.service
3.157s livesys.service
3.155s akmods-shutdown.service
3.144s akmods.service
3.143s gssproxy.service
2.889s rpcbind.service
除此之外，每个 IO 都需要永远完成？我如何追踪这个？