netdev - Re: unregister_netdevice: waiting for DEV to become free (2)

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Date:   Mon, 22 Apr 2019 08:58:31 -0600
From:   David Ahern <dsahern@...il.com>
To:     Stephen Suryaputra <ssuryaextr@...il.com>
Cc:     Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
        Julian Anastasov <ja@....bg>,
        Cong Wang <xiyou.wangcong@...il.com>,
        syzbot <syzbot+30209ea299c09d8785c9@...kaller.appspotmail.com>,
        ddstreet@...e.org, dvyukov@...gle.com,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: unregister_netdevice: waiting for DEV to become free (2)

On 4/21/19 2:41 PM, Stephen Suryaputra wrote:
> Hi David,
> 
> I looked at patchwork. This patch hasn't been accepted. Is there a plan
> to resubmit? It is very useful. I had to debug refcnt issues multiple
> times for my employer.

I think the inlined versions of dev_put and dev_hold are better for
performance.

I could submit it with a DEBUG config to enable. It has been invaluable
to me over the past 3+ years debugging refcount problems.