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Date: Thu, 26 Nov 2020 11:07:54 +0100
From: Kurt Jaeger <pi@freebsd.org>
To: Graham Perrin <grahamperrin@gmail.com>
Cc: freebsd-current@freebsd.org
Subject: Re: zpool export: umount failed, device inexplicably busy (lsof
 found nothing)
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Hi!

> If the problem recurs: is it _ever_ sane to get nothing listed by lsof
> for a volume that can not be unmounted?

Use fstat -- this is part of the base system.

Maybe lsof does not catch every corner case ?

-- 
pi@opsec.eu            +49 171 3101372                    Now what ?