netdev - Re: [Patch net] ipv4: restore rt->fi for reference counting

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Message-ID: <1494370367.7796.92.camel@edumazet-glaptop3.roam.corp.google.com>
Date:   Tue, 09 May 2017 15:52:47 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Cong Wang <xiyou.wangcong@...il.com>
Cc:     David Miller <davem@...emloft.net>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Andrey Konovalov <andreyknvl@...gle.com>,
        Eric Dumazet <edumazet@...gle.com>
Subject: Re: [Patch net] ipv4: restore rt->fi for reference counting

On Tue, 2017-05-09 at 15:07 -0700, Cong Wang wrote:
> On Tue, May 9, 2017 at 1:56 PM, Cong Wang <xiyou.wangcong@...il.com> wrote:
> > Wait... if we transfer dst->dev to loopback_dev because we don't
> > want to block unregister path, then we might have a similar problem
> > for rt->fi too, fib_info is still referenced by dst, so these nh_dev's still
> > hold the dev references...
> >
> 
> I finally come up with the attach patch... Do you mind to give it a try?

I will, but this might be delayed by a few hours.

In the mean time, it looks like you could try adding the following to
your .config ;)

CONFIG_IP_ROUTE_MULTIPATH=y