When both prefix_sysroot and accept_root is true, the entry for "/" will be accepted and converted to "/sysroot/". Why? If the entry is read from the main system's fstab, then we already mounted /sysroot/, hence it is not and should not re-add the .mount unit for /sysroot/. However, if we want to specify the root mount through the kernel command line or credential, without this change, we need to specify the same entry in the two options. E.g. === systemd.mount-extra=/dev/sda1:/:auto:defaults rd.systemd.mount-extra=/dev/sda1:/sysroot:auto:defaults === That's inconvenient. Of course, we can dedup that by using traditional options, but cannot when defined in credential.
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