[issue1561] panic: assertion: vp->v_rdev != NULL in devfs_spec_strategy

["Alex Hornung \(via DragonFly issue tracker\)" <sinknull@xxxxxxxxxxxxxxxxxxxxx>]

Alex Hornung <ahornung@gmail.com> added the comment:

I finally had some time to look into this. It seems you were using 'vn' disks. 
The actual issue arises when a device is ripped out from under devfs while it's 
still in use (mounted or for that matter open in any other way).

vn has a large number of issues I'm currently working on, and hope to commit it 
relatively soon.

Regards,
Alex Hornung

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priority:  -> bug
status: chatting -> in-progress

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