Messages in this thread | | | Date | Sat, 22 Mar 2014 19:24:04 +0000 | From | Al Viro <> | Subject | Re: Can't umount /mnt/dev after calling dd(1) and with /mnt/dev is a bind mount |
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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?
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