Re: [PATCH] net: sched: make default fifo qdiscs appear in the dump
From: Eric Dumazet
Date: Fri Oct 21 2016 - 07:37:08 EST
On Fri, 2016-10-21 at 10:45 +0200, Jiri Kosina wrote:
> The original reason  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.
>  http://lkml.kernel.org/r/1460732328.10638.74.camel@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Signed-off-by: Jiri Kosina <jkosina@xxxxxxx>
Some of us are dealing with huge HTB hierarchies, so adding default fifo
in the dump will add more data pumped from the kernel.
BwE  for instance dumps qdisc/classes every 5 seconds.
I guess we'll need to not pull this patch in our kernels.
This reminds me of an HTB patch to avoid dumping rate estimates for HTB.
I will send it today.