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Description of problem:
I already added this as a comment to bug #55540 but there seems to have been no
response, so I'll try and file as a bug in it's own right...

It would seem that an initrd image generated with mkinitrd up to and including
3.3.6-1 doesn't work quite correctly if using a devfs enabled kernel. More
specifically, the kernel boots OK but there is a non-fatal problem early on in
the init sequence when trying to unmount the initrd filesystem. This is due to
the filesystem being busy as a consequence of /dev being mounted underneath.

The attached patch is something I plagiarised from Mandrake's additions to the
original RH mkinitrd. Fundamentally, all it does is to close I/O on devfs to
allow it to be remounted under real root instead of initrd root, and thus allow
/initrd to be successfully unmounted.

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1.Build devfs enabled kernel
2.Boot with mkinitrd generated initrd
3.
	

Actual Results:  System unable to unmount /initrd

Additional info: