From mboxrd@z Thu Jan  1 00:00:00 1970
From: Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Subject: Re: [PATCH] IB/IPoIB: Check the headroom size
Date: Wed, 26 Apr 2017 09:50:38 -0400
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To: Honggang LI <honli-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: Paolo Abeni <pabeni-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, Or Gerlitz <gerlitz.or-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, Erez Shitrit <erezsh-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>, Erez Shitrit <erezsh-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>, "linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" <linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, Linux Netdev List <netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, David Miller <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
List-Id: linux-rdma@vger.kernel.org

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
    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-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
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