PS. I've noticed that the loop devices are not released.
mount -o loop $from $to # this allocates a loop device, as can be seen in ps auxww # (under kernel 2.4.x, as [loop0] or similar kernel threads) # or in /proc/mounts (source of the mount point).
umount $to # now it's unmounted, but the loop device is still active. # this means that the space allocated by $from is not released and # that after 8 mount cycles all loop devices are used up.
I don't know whether umount $from combined with a normal /etc/mtab file will deallocate the loop device.
If so, then my previous patch is bad.
But then I don't know what the correct approach is.
The recommendation to make /etc/mtab a symlink to /proc/mounts is not from me, and it helps to prevent other problems, so I don't like giving up this habit very much.
Could you tell me whether loop devices are properly released (with and without my patch)?
I could then write a new patch which looks at /proc/mounts to find out the allocated loop device and deallocate it explicitely using losetup -d.
Christian.
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