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Re: net: possible deadlock in skb_queue_tail

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On Mon, Feb 20, 2017 at 5:29 AM, Andrey Konovalov <andreyknvl@google.com> wrote:
> other info that might help us debug this:
>
>  Possible unsafe locking scenario:
>
>        CPU0                    CPU1
>        ----                    ----
>   lock(&(&pcpu->lock)->rlock);
>                                lock(&(&list->lock)->rlock#3);
>                                lock(&(&pcpu->lock)->rlock);
>   lock(&(&list->lock)->rlock#3);
>

They are different types of sockets and different lists of skb's,
one is netlink socket the other is udp socket, so I don't think
we could have a deadlock in this scenario, we probably need to
explicitly mark them as different lockdep classes.

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net: possible deadlock in skb_queue_tail Andrey Konovalov <andreyknvl@google.com> - 2017-02-20 14:40 +0100
  Re: net: possible deadlock in skb_queue_tail Cong Wang <xiyou.wangcong@gmail.com> - 2017-02-21 00:00 +0100
  Re: net: possible deadlock in skb_queue_tail Florian Westphal <fw@strlen.de> - 2017-02-24 04:00 +0100

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