Once upon a time, Zbigniew Jędrzejewski-Szmek <zbyszek(a)in.waw.pl> said:
Without an initrd we immediately have the following limitations:
- all kernel modules needed to mount root must be compiled in
- all that code is always loaded and remains in unswappable memory
- root= syntax is limited to what the kernel understands, i.e.
no root=UUID=… o root=/dev/disk/by-path/… or other udev links,
no encryption or dm-verity.
- no bluetooth keyboards or other fancy peripherals
- recovery is pretty hard
Also, the security lock-down for the kernel command line means:
- no network root filesystem
- no boot-time-only kernel/module configuration
The idea of switching from grub2 to sd-boot would also drop network boot
and BIOS support. Supporting boot loaders seems to be a bit of a issue
sometimes, so trying to support multiple boot loaders seems like a bad
idea to me.
--
Chris Adams <linux(a)cmadams.net>