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Re: subvolume nomenclature



On Fri, Mar 2, 2012 at 1:44 PM, Brian J. Murrell <brian@xxxxxxxxxxxxxxx> wrote:
> On 12-03-02 08:36 AM, cwillu wrote:
>>
>> Try btrfs sub delete /etc/apt/oneiric, assuming that that's the path
>> where you actually see it.
>
> Well, there is a root filesystem at /etc/apt/oneiric:
>
> # ls /etc/apt/oneiric/
> bin   etc         initrd.img.old  mnt   root  selinux  tmp  vmlinuz
> boot  home        lib             opt   run   srv      usr  vmlinuz.old
> dev   initrd.img  media           proc  sbin  sys      var
>
> but it doesn't delete:
>
> # btrfs subvolume delete /etc/apt/oneiric
> Delete subvolume '/etc/apt/oneiric'
> ERROR: cannot delete '/etc/apt/oneiric' - Device or resource busy

root@repository:~/foo$ btrfs sub create bar
Create subvolume './bar'
root@repository:~/foo$ cd bar
root@repository:~/foo/bar$ btrfs sub del /home/cwillu/foo/bar
Delete subvolume '/home/cwillu/foo/bar'
ERROR: cannot delete '/home/cwillu/foo/bar' - Device or resource busy


It's likely there's at least one process with an open handle to that
subvolume (even just a shell that as its current working directory).
lsof | grep /etc/apt/oneiric should tell you what you need.
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