mount: could not find any free loop device

[Andras Simon]

On 6/27/07, Luciano Rocha <strange at nsk.no-ip.org> wrote:
> On Wed, Jun 27, 2007 at 01:24:02PM +0200, Andras Simon wrote:
> >  On 6/27/07, Luciano Rocha <strange at nsk.no-ip.org> wrote:
> > > And it should, when the mount command specified the option loop. From
> > > the manual:
> > >
> > > THE LOOP DEVICE
> > >    The umount command will free the loop device (if any)  associated
> > >    with the mount, in case it finds the option 'loop=...' in /etc/mtab,
> > >    or when the -d option was given.  Any pending loop devices can be
> > >    freed  using 'losetup -d', see losetup(8).
> > >
> > > My umount works correctly, with or without offset.
> > 
> >  You're right! I shouldn't have stopped reading man umount at the first
> >  mention of loop. OTOH, it seems like it's a mount and not an umount
> >  bug, because the relevant entry in /etc/mtab
> > 
> >  /dev/loop0 /mnt fuseblk rw,nosuid,nodev,noatime,allow_other,blksize=4096
> 0 0
> > 
> >  doesn't have the 'loop=...' option. So umount is in its rights not to
> >  free the loop device.
> > 
> 
> Er, could you do an ls -ld /etc/mtab? That looks like /proc/mounts, not
> the userland created /etc/mtab.

-rw-r--r-- 1 root root 371 2007-06-27 14:29 /etc/mtab

It's just an ordinary file.

> Or it could be that the fuse wrapper doesn't do the right thing, I
> haven't tested any fuse filesystem, just standard iso.

You're right again! When unmounting a standard iso, the loop device gets freed.

Andras