Ehm, the proper tip was "recompile", not "tunnel enabled". ;-) CIPE
contains a duplication of the regular IPIP tunneling code and does
never touch or need the real tunnel driver in any way.
But every instance of "opendev: alloc: EPERM" I've ever heard of was
due to a mismatch between kernel and CIPE module. Although I still
don't know why this particular error comes up it's invariably fixed by
recompiling the CIPE modules. This belongs on a FAQ page.
Olaf
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