From: Jiri Kosina <ji...@kernel.org> Date: Mon, 6 Mar 2017 12:03:38 +0100 (CET)
> Ah, right you are, thanks. The complete fix is not super trivial, as it > needs some more surgery to tc_dump_qdisc_root(), tc_dump_tclass_root() and > qdisc_match_from_root() (see 69012ae42 for some details). > > There are two options: > > - this gets fixed in two phases, in first everything *but* noop qdisc gets > dumped (in the "give me everything" dump) and later we finalize it by > teaching the above functions about noop_qdisc as well > > - I extend this patchset to handle noop qdisc from the very beginning; > I am unlikely to find time for this during coming weeks though. But OTOH > this whole thing is very low priority anyway > > What do you think? I'm not too hot on this whole idea because the only way you can emit the noop_qdisc is to "dup" it by allocating a new qdisc so that you can link it in. This has two downsides: 1) Extra overhead and memory usage 2) All of the simple checks against &noop_qdisc might not be so simply any more.
