netdev - Re: Lockdep warning in vxlan

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Message-ID: <20121220083436.0c7fc33f@nehalam.linuxnetplumber.net>
Date:	Thu, 20 Dec 2012 08:34:36 -0800
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Yan Burman <yanb@...lanox.com>
Cc:	<netdev@...r.kernel.org>
Subject: Re: Lockdep warning in vxlan

On Thu, 20 Dec 2012 16:00:32 +0200
Yan Burman <yanb@...lanox.com> wrote:

> Hi.
> 
> When working with vxlan from current net-next, I got a lockdep warning 
> (below).
> It seems to happen when I have host B pinging host A and while the pings 
> continue,
> I do "ip link del" on the vxlan interface on host A. The lockdep warning 
> is on host A.
> Tell me if you need some more info.
> 

Looks like the case of nested ARP requests, the initial request is coming
from neigh_timer (ARP retransmit), but inside neigh_probe the lock
is dropped?
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