netdev - Re: [PATCH net] ipv6: Reflect MTU changes on PMTU of exceptions for MTU-less routes

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Message-ID: <20180305001245.23b56b3f@epycfail>
Date:   Mon, 5 Mar 2018 00:12:45 +0100
From:   Stefano Brivio <sbrivio@...hat.com>
To:     David Ahern <dsahern@...il.com>
Cc:     "David S . Miller" <davem@...emloft.net>,
        Wei Wang <weiwan@...gle.com>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        Maciej Żenczykowski 
        <maze@...gle.com>, netdev@...r.kernel.org
Subject: Re: [PATCH net] ipv6: Reflect MTU changes on PMTU of exceptions for
 MTU-less routes

On Sat, 3 Mar 2018 12:22:36 +0100
Stefano Brivio <sbrivio@...hat.com> wrote:

> > And please codify the above expectation as a test under
> > tools/testing/selftests/net  
> 
> And this, along with v2.

On a second thought: I start thinking it doesn't make much sense,
especially given the current context of self-tests, to explicitly test
this, because it's a rather particular corner case.

I think it would make more sense to introduce generic tests first.
About, say, PMTU, or route exceptions, but not "tunnel causes route
exception and administrative change doesn't affect PMTU".

-- 
Stefano