[Bug 201486] Re: add boot argument to allow legacy change_root removal

[maximilian attems]

initrd-tools is long gone, thus closing.

** Changed in: initramfs-tools (Ubuntu)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/201486

Title:
  add boot argument to allow legacy change_root removal

Status in “initramfs-tools” package in Ubuntu:
  Fix Released

Bug description:
  Binary package hint: initramfs-tools

  In Linux 2.6 the change_root method of invoking initrd is considered
  "legacy", and might be removed in future.  The new method is
  pivot_root, which does not have any special case code paths in kernel
  for initrd after it's block device /dev/ram0 is created.  The kernel
  should be booted "vmlinux root=/dev/ram0" which will mount the initrd,
  and execute /sbin/init.

  At present, this is problematic for initrd-tools (Gutsy), since there
  is no way to specify the "real" root filesystem that is desired,
  without using root= kernel commandline argument.

  I propose a new argument be interpreted by initrd-tools /init script,
  to allow migration to a fixed "root=/dev/ram0" on all kernels using
  initrd to mount the real root device.  There is precedent with
  rdinit=, although "rdroot=/dev/sda1" seems counterintuitive.
  Alternatives should be considered that are not confusing.  Perhaps
  root2=, realroot=, or some other form.

  Parsing the new argument could be conditional on finding
  "root=/dev/ram0" in kernel commandline, to make things more precise.

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