[systemd-devel] Why did you set MountFlags=slave in systemd-udevd.service.in

[Hongzhi, Song]

Hi,

systemd, upstream commit id c2c13f2df42e0691aecabe3979ea81cd7faa35c7

You set MountFlags=slave just for keeping mounts done by udev rules 
private to udevd.

So all block device mounted by systemd-udevd is unvisible for host.

I don't know why. And is there any bad effect, if I change slave to shared ?

Thanks for your help.

BR，

Hongzhi.Song