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Re: PROBLEM: 2.6.11-rc2 hangs on bridge shutdown (br0)

To: "YOSHIFUJI Hideaki / ?$B5HF#1QL@" <yoshfuji@xxxxxxxxxxxxxx>
Subject: Re: PROBLEM: 2.6.11-rc2 hangs on bridge shutdown (br0)
From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Date: Sun, 6 Feb 2005 18:00:50 +1100
Cc: davem@xxxxxxxxxxxxx, mirko.parthey@xxxxxxxxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxx, shemminger@xxxxxxxx
In-reply-to: <20050206.145007.34543324.yoshfuji@xxxxxxxxxxxxxx>
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On Sun, Feb 06, 2005 at 02:50:07PM +0900, YOSHIFUJI Hideaki / ?$B5HF#1QL@ wrote:
> Which means in addrconf_notiry(), if the dev == &loopback_dev,
> call addrconf_ifdown for every device like this:

This should fix the reported issue.  However, I'm not sure if it's
a good idea to stop all IP traffic when lo goes down.  We don't do
that for IPv4.

Besides, we'll still need to fix the rt6i_idev GC issue since the
same bug can occur when eth0 goes down and some appliation is holding
a dst to a local address route.  It can become a dead-lock if the
said application then invokes a syscall that takes the RTNL.

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