systemd: root device on iscsi

[Bill Nottingham]

Jeremy Sanders (jeremy at jeremysanders.net) said: 
> > Jeremy Sanders (jeremy at jeremysanders.net) said:
> >> Your patch does
> >> 
> >> -bash-4.2# findmnt -m -n -o fstype,options /
> >> ext4   rw,relatime,user_xattr,acl,barrier=0,data=ordered
> >> 
> >> Which doesn't show the _netdev option. If I change this to
> >> 
> >> -bash-4.2# findmnt -s -n -o fstype,options /
> >> ext4   _netdev,barrier=0,relatime
> >> 
> >> This works. I don't know whether you want to change "-m" to "-s"...
> > 
> > Well, -s requires everything to be in fstab. -m would work for things
> > mounted with plain "mount -o _netdev", assuming /run/mount/utab is
> > properly populated. I'm assuming on your system it's not?
> 
> /run/mount/utab is empty. We're using tftpboot and dracut's network initrd 
> support to mount the root, so perhaps that's not properly populating it. 
> Perhaps this is a dracut bug too. Presumably I should file a bug for 
> something so this can be worked on offline.

Sure, start with initscripts and we can go from there.

Bill