Guido,

Currently in my program, I manually remove and then re-adds the reader to the loop in the parent process right after the fork(). I also considered a dirty monkey-patching of remove_reader() and remove_writer() which would act as the original versions but without removing the fds from the epoll object (ensuring I don't get bitten by the same behavior for an other fd).

The easiest fix, I think, is indeed to close the selector without unregistering the fds, but I don't know if doing so would have undesired side effects on an other platform than Linux (resources leak, or the close call failing maybe).