From: Jiri Kosina <[email protected]> Date: Wed, 8 Mar 2017 16:03:32 +0100 (CET)
> From: Jiri Kosina <[email protected]> > > The original reason [1] for having hidden qdiscs (potential scalability > issues in qdisc_match_from_root() with single linked list in case of large > amount of qdiscs) has been invalidated by 59cc1f61f0 ("net: sched: convert > qdisc linked list to hashtable"). > > This allows us for bringing more clarity and determinism into the dump by > making default pfifo qdiscs visible. > > We're not turning this on by default though, at it was deemed [2] too > intrusive / unnecessary change of default behavior towards userspace. > Instead, TCA_DUMP_INVISIBLE netlink attribute is introduced, which allows > applications to request complete qdisc hierarchy dump, including the > ones that have always been implicit/invisible. > > Singleton noop_qdisc stays invisible, as teaching the whole infrastructure > about singletons would require quite some surgery with very little gain > (seeing no qdisc or seeing noop qdisc in the dump is probably setting > the same user expectation). > > [1] > http://lkml.kernel.org/r/[email protected] > [2] > http://lkml.kernel.org/r/[email protected] > > Signed-off-by: Jiri Kosina <[email protected]> Applied, thanks Jiri.
