netdev - Re: bond: take rcu lock in bond_poll

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Message-ID: <CAM_iQpUVMszSA4ZyiJJgJAu053DZ3RbU91kBewrMMiWd7E19Lg@mail.gmail.com>
Date:   Fri, 28 Sep 2018 09:55:52 -0700
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Dave Jones <davej@...emonkey.org.uk>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: bond: take rcu lock in bond_poll_controller

On Fri, Sep 28, 2018 at 9:18 AM Dave Jones <davej@...emonkey.org.uk> wrote:
>
> Callers of bond_for_each_slave_rcu are expected to hold the rcu lock,
> otherwise a trace like below is shown

So why not take rcu read lock in netpoll_send_skb_on_dev() where
RCU is also assumed?

As I said, I can't explain why you didn't trigger the RCU warning in
netpoll_send_skb_on_dev()...