netdev - Re: [PATCH net-next v2] net: allow configuring default qdisc

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Message-Id: <20170411.220959.313852914647879245.davem@davemloft.net>
Date:   Tue, 11 Apr 2017 22:09:59 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     stephen@...workplumber.org
Cc:     netdev@...r.kernel.org, sthemmin@...rosoft.com
Subject: Re: [PATCH net-next v2] net: allow configuring default qdisc

From: Stephen Hemminger <stephen@...workplumber.org>
Date: Sat,  8 Apr 2017 15:39:46 -0400

> Since 3.12 it has been possible to configure the default queuing
> discipline via sysctl. This patch adds ability to configure the
> default queue discipline in kernel configuration. This is useful for
> environments where configuring the value from userspace is difficult
> to manage.
> 
> The default is still the same as before (pfifo_fast) and it is
> possible to change after kernel init with sysctl. This is similar
> to how TCP congestion control works.
> 
> Signed-off-by: Stephen Hemminger <sthemmin@...rosoft.com>
> ---
> v2 - rearrange order of menu items
>      use pfifo_fast not pfifo

Stephen I'm still thinking about this.

Normal users typing "make oldconfig" shouldn't be asked a question
like this.  They have no idea.  This is just like how we hide all the
advanced ipv4 routing choices behind the Kconfig symbol
IP_ADVANCED_ROUTER and TCP congestion control with TCP_CONG_ADVANCED.

And from experience I know that if it shows up when Linus types 'make'
after pulling this in, he will complain :-)