Re: Deleting child qdisc doesn't reset parent to default qdisc?

[Cong Wang]

On Tue, Jun 28, 2016 at 8:19 AM, Jiri Kosina <jikos@xxxxxxxxxx> wrote:
> BTW, I've started to actually work on fixing this, and I've noticed that
> TBF behavior actually violates what's stated in pfifo_fast manpage:
>
> ==========
>         Whenever  an  interface is created, the pfifo_fast qdisc is
>         automatically used as a queue. If another qdisc is
>         attached, it preempts the default pfifo_fast, which automatically
>         returns to function when an  existing  qdisc is detached.
>
>         In this sense this qdisc is magic, and unlike other qdiscs.
> ==========

It is out of date, now default qdisc can be set to any other qdisc
via /proc. Also, probably due to historical reasons, we don't have
a unified default default qdisc, some uses bfifo, some uses pfifo,
we may break some existing script if we change that.