netdev - Re: [PATCH] ipv6: remove the unnecessary statement in find

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Date:	Fri, 01 Nov 2013 18:08:18 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	duanj.fnst@...fujitsu.com
Cc:	netdev@...r.kernel.org, hannes@...essinduktion.org
Subject: Re: [PATCH] ipv6: remove the unnecessary statement in find_match()

From: Duan Jiong <duanj.fnst@...fujitsu.com>
Date: Thu, 31 Oct 2013 19:09:56 +0800

> Removing CONFIG_IPV6_ROUTER_PREF means that the Router Preference is
> always on, is this understanding right?
> 
> If that's is correct, i think compatibility issues will arise. For
> example, when the CONFIG_IPV6_ROUTER_PREF option is on, the kernel
> should not do round-robin during default router selection, but when
> the CONFIG_IPV6_ROUTER_PREF option is off, the kernel should do it.

Everyone is essentially getting it enabled right now anyways, since
%99.999999 of users run distribution kernels.  Nobody has asked
for a run-time knob for this, which therefore means that %99.999999
of users simply do not care.

Yes there are people who build their own kernels, but to tell you
the truth I doubt anyone really turns this off explicitly to turn
off router preference handling.

But I'm willing to cater to them _iff_ the RFC tells us we should
provide should a capability.
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