[...] Another known issue is that unloading a 2.6 kernel module which is referenced by some part of RTnet, like NIC drivers when the interface is up, will let your rmmod hang forever. It's to some degree a kernel bug but it's also due to the way we (mis-)use the module refcounter. Avoid this situation by cleaning up in the correct order (e.g. use the rtnet script).
This problem seems to be confined to the busybox 1.0 modutils (which are a bit broken anyhow). I tested it yesterday with standard rmmod on a SuSE 9.1, and the system correctly reported "module in use" instead of locking up. So, the refcounter usage in RTnet seems to be correct.
Jan
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