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Date:   Fri, 11 Feb 2022 15:57:39 -0800
From:   Jakub Kicinski <>
To:     Eric Dumazet <>
Cc:     "David S . Miller" <>,
        netdev <>,
        Eric Dumazet <>,
        Mahesh Bandewar <>
Subject: Re: [PATCH net-next 0/4] ipv6: remove addrconf reliance on loopback

On Thu, 10 Feb 2022 13:42:27 -0800 Eric Dumazet wrote:
> Second patch in this series removes IPv6 requirement about the netns
> loopback device being the last device being dismantled.


> This was needed because rt6_uncached_list_flush_dev()
> and ip6_dst_ifdown() had to switch dst dev to a known
> device (loopback).
> Instead of loopback, we can use the (hidden) blackhole_netdev
> which is also always there.
> This will allow future simplfications of netdev_run_to()

Should I take a stab at it, or is it on your todo list, anyway?

> and other parts of the stack like default_device_exit_batch().
> Last two patches are optimizations for both IP families.

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