we really need to talk with kjc@csl.sony.co.jp.  we should not
	add differences with master ALTQ tree, we need to keep it very
	easy to upgrade ALTQ portion.

>>         to migrate to ALTQ gradually, we need to kee if_qflush() until
>>         all the drivers are rewritten.  if_qflush() certainly works for
>>         non-ALTQ drivers (correct me if i'm wrong).
>Okay, that may be.  However, it's quite dangerous to leave an
>interface there that will break if it's used -- and it seems clear
>that people want to ALTQify everything *.

	if we are done with transition, i think it make sense.

>>         not sure i understand the concern, but IFQ_PURGE() may be
>>         expanded into ALTQ_PURGE().
>No, it is never `expanded into ALTQ_PURGE()'.  It is expanded into
>some big conditional which *may* do an ALTQ_PURGE().  My point was
>that test could just as well go in if_qflush().  There is no reason to
>have an inlined macro for it at all.  Actually, it's a waste of space.

	hmm.

itojun