[systemd-devel] How many times is the root mounted in boot up?

[cee1]

Hi all,

In case of no initrd and mounting the root by specifying
"root=/dev/sdaN" in kernel command line, how many time is the root
mounted in systemd?

I find:
1. systemd will generate a "-.mount" unit from /proc/self/mountsinfo
2. systemd will generate a "-.mount" unit by systemd-fstab-generator

Q:
* Which one takes priority?
* For 1, it will not do the mount action, but 2 will. Am I right? If
so, why we mount root here(again)?

And systemd-remount-fs.service will remount the root again, thus apply
options in fstab?

BTW, where are the units generated by generators?



-- 
Regards,

- cee1