The kernel is not being rebooted meanwhile, so /proc/cmdline, so it still states the original device as root. For example: root=/dev/vg/rootlv rootflags=subvol=@ ro
The kernel is not being rebooted meanwhile, so /proc/cmdline, so it still states the original device as root.
For example:
root=/dev/vg/rootlv rootflags=subvol=@ ro