From: Al Viro <viro@ZenIV.linux.org.uk>
To: Francis Moreau <francis.moro@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Re: Can't umount /mnt/dev after calling dd(1) and with /mnt/dev is a bind mount
Date: Sat, 22 Mar 2014 19:24:04 +0000 [thread overview]
Message-ID: <20140322192404.GG18016@ZenIV.linux.org.uk> (raw)
In-Reply-To: <532DBFC8.4020202@gmail.com>
On Sat, Mar 22, 2014 at 05:52:24PM +0100, Francis Moreau wrote:
> I'm posting here because it might be a behaviour related to the kernel
> internals that I can't explain from my user point of view :)
>
> Basically I'm doing this:
>
> mount -o bind /dev/ /mnt/dev &&
> chroot /mnt dd bs=440 conv=notrunc count=1 if=gptmbr.bin of=/dev/loop0
> umount /mnt/dev
>
> but umount gives the following error: "umount: /mnt/dev: target is busy"
What do you have in /proc/self/mountinfo before all that?
next prev parent reply other threads:[~2014-03-22 19:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-22 16:52 Can't umount /mnt/dev after calling dd(1) and with /mnt/dev is a bind mount Francis Moreau
2014-03-22 19:24 ` Al Viro [this message]
2014-03-22 20:30 ` Francis Moreau
2014-03-30 7:54 ` Francis Moreau
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