why can't you exportfs /dir and /dir/sub?

[der Mouse]

In article <159281 at pyramid.pyramid.com>, amirosh at shakespyr.Pyramid.COM (Alex Miroshnichenko) writes:
> In article <felps.676828858 at convex.convex.com>, felps at convex.com (Robert
> Felps) writes:
>> Why can't this be done?

>> EXPORTFS(8)        NFS Programmer's Reference        EXPORTFS(8)
[...]
>>      You cannot export a directory that is either a parent- or a
>>      sub-directory of one that is currently exported and within the
>>      same filesystem.
> exportfs is performed on a filesystem, not on a directory tree.

Well yes, that's the bug.  The question is, why couldn't they fix it?

					der Mouse

			old: mcgill-vision!mouse
			new: mouse at larry.mcrcim.mcgill.edu