>
> So long as the route is marked RTF_UP, it cannot be deleted.  In a
> single-threaded kernel, it is not possible for this code to be
> preempted, so there is no means by which the route flags could be
> changed.  (RTF_UP is unset when and only when the route is deleted
> from the radix tree.)

I agree. However, how would it work on a multi-threaded FreeBSD 5 kernel ?

Regards,
  Vincent

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