netdev - Re: [PATCH] net-ipv6: on device mtu change do not add mtu to mtu-less routes

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Message-Id: <20161109.132038.703907726217904996.davem@davemloft.net>
Date:   Wed, 09 Nov 2016 13:20:38 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     zenczykowski@...il.com
Cc:     maze@...gle.com, netdev@...r.kernel.org, edumazet@...gle.com
Subject: Re: [PATCH] net-ipv6: on device mtu change do not add mtu to
 mtu-less routes

From: Maciej Żenczykowski <zenczykowski@...il.com>
Date: Fri,  4 Nov 2016 14:51:54 -0700

> From: Maciej Żenczykowski <maze@...gle.com>
> 
> Routes can specify an mtu explicitly or inherit the mtu from
> the underlying device - this inheritance is implemented in
> dst->ops->mtu handlers ip6_mtu() and ip6_blackhole_mtu().
> 
> Currently changing the mtu of a device adds mtu explicitly
> to routes using that device.
 ...
> This is desirable because changing device mtu and then resetting it
> to the previous value shouldn't change the user visible routing table.
> 
> Signed-off-by: Maciej Żenczykowski <maze@...gle.com>

Applied, thank you.