netdev - Re: [PATCH] IB/IPoIB: Check the headroom size

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Date:   Wed, 26 Apr 2017 22:11:39 +0800
From:   Honggang LI <honli@...hat.com>
To:     Doug Ledford <dledford@...hat.com>
Cc:     Paolo Abeni <pabeni@...hat.com>, Or Gerlitz <gerlitz.or@...il.com>,
        Erez Shitrit <erezsh@....mellanox.co.il>,
        Erez Shitrit <erezsh@...lanox.com>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        Linux Netdev List <netdev@...r.kernel.org>,
        David Miller <davem@...emloft.net>
Subject: Re: [PATCH] IB/IPoIB: Check the headroom size

On Wed, Apr 26, 2017 at 09:50:38AM -0400, Doug Ledford wrote:
> On Wed, 2017-04-26 at 09:48 -0400, Doug Ledford wrote:
> > On Wed, 2017-04-26 at 21:33 +0800, Honggang LI wrote:
> > > 
> > > Yes, it is during the process of removing the final slave. The
> > > reproducer looks like this:
> > > 
> > > ping remote_ip_over_bonding_interface &
> > > while 1; do
> > > 	ifdown bond0
> > > 	ifup   bond0
> > > done
> 
> BTW, rerunning your test as:
> 
> ping remote_ip_over_bonding_interface &
> while 1; do
>     echo -n "Downing interface..."
>     ifdown bond0

Confirmed panic in here.

>     echo "done."
>     sleep 1
>     echo -n "Bringing interface up..."
>     ifup bond0
>     echo "done."
> done
> 
> will allow you to more precisely identify whether the failure is during
> the down or the up of the interface.
> 
> -- 
> Doug Ledford <dledford@...hat.com>
>     GPG KeyID: B826A3330E572FDD
>    
> Key fingerprint = AE6B 1BDA 122B 23B4 265B  1274 B826 A333 0E57 2FDD
> 
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