netdev - Re: [PATCH net-next v5] net: ipv6: Make address flushing on ifdown optional

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Message-Id: <1444820621.2175377.409880265.37A31E2D@webmail.messagingengine.com>
Date:	Wed, 14 Oct 2015 13:03:41 +0200
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	Nicolas Dichtel <nicolas.dichtel@...nd.com>,
	David Miller <davem@...emloft.net>, dsa@...ulusnetworks.com
Cc:	netdev@...r.kernel.org, hannes@...hat.com
Subject: Re: [PATCH net-next v5] net: ipv6: Make address flushing on ifdown
 optional

On Wed, Oct 14, 2015, at 12:08, Nicolas Dichtel wrote:
> Le 14/10/2015 11:34, Hannes Frederic Sowa a écrit :
> [sni]
> > This sysctl is on my list to be enabled soon by default by any systemd
> > based distribution. For that reason, could you maybe remove all the
> I'm not sure to understand why we add a sysctl then. Or at least, why the
> linux
> default value is different from all standard distrib. I will be like
> rp_filter :/

The difference is that people upgrade (in case of fedora they get a
.rpmnew file) or install a distribution and don't wonder or have
assumptions about old behavior. In case companies integrate kernel in
products/appliances without a way to manage those sysctls we cannot
simply change them as this would break assumptions for them. I think
those are two different cases.

Bye,
Hannes
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