[issue998] Unconfiguring a vn while it is mounted

["Stathis Kamperis \(via DragonFly issue tracker\)" <sinknull@xxxxxxxxxxxxxxxxxxxxxxx>]

Stathis Kamperis <ekamperi@gmail.com> added the comment:

: I made vn(4) return EBUSY if it is asked to detach a vn unit with vnode
: references to it.

Simon explained that the check in the patch doesn't cover all the cases. There
might still be references from other partition/slices that aren't detected. Just
reproduced it.


I'll further investigate it.

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