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Date:      Thu, 4 Jul 2013 07:15:39 +0300
From:      Konstantin Belousov <kostikbel@gmail.com>
To:        Steven Hartland <smh@freebsd.org>
Cc:        freebsd-fs@FreeBSD.org
Subject:   Re: kern/180236: [zfs] [nullfs] Leakage free space using ZFS with nullfs on 9.1-STABLE
Message-ID:  <20130704041539.GE91021@kib.kiev.ua>
In-Reply-To: <201307040000.r64001v6076818@freefall.freebsd.org>
References:  <201307040000.r64001v6076818@freefall.freebsd.org>

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On Thu, Jul 04, 2013 at 12:00:01AM +0000, Steven Hartland wrote:
> The following reply was made to PR kern/180236; it has been noted by GNAT=
S.
>=20
> From: "Steven Hartland" <smh@freebsd.org>
> To: <bug-followup@freebsd.org>,
> 	"Ivan Klymenko" <fidaj@ukr.net>
> Cc: =20
> Subject: Re: kern/180236: [zfs] [nullfs] Leakage free space using ZFS wit=
h nullfs on 9.1-STABLE
> Date: Thu, 4 Jul 2013 00:58:13 +0100
>=20
>  Looks like nullfs isn't cleaning up correctly in the case
>  where a rename colides with an existing file hence results
>  in an implicit remove.
> =20
>  This can be seen in the zdb output for the volume in that
>  before the unmount all the plain file entries still exist
>  but after the unmount of nullfs they are gone.

Can you demonstrate the scenario of the problem, e.g. using the basic
filesystem commands, like cp(1), mv(1) ?  Does the issue reproduce
on UFS ?

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