loopback mount won't umount on 2.2.12

[Khyron]

Okay, I've seen various references to problems with loopback
mounts under (early) 2.2.x kernels. But I don't see any reference
to a solution (ie. how to umount the stupid thing).

My situation is that I have mounted a CD image on a machine
for use in kickstart builds. The mount point is /kickstart/image

When I attempt "umount /kickstart/image" and other variations
on the theme, I get a "umount: /kickstart/image: device is busy".

Is there ANYWAY (w/o rebooting) to unmount this, forcibly or
otherwise? Or is the solution only to reboot?

TIA!

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Khyron					    mailto:[e-mail]
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