netdev - Re: open sockets preventing unregister_netdevice from completing in linux-next (next-20120724)

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Message-Id: <20120725.151737.1807149851147342859.davem@davemloft.net>
Date:	Wed, 25 Jul 2012 15:17:37 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	bjorn@...k.no, netdev@...r.kernel.org
Subject: Re: open sockets preventing unregister_netdevice from completing
 in linux-next (next-20120724)

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Wed, 25 Jul 2012 16:38:48 +0200

> Yes, we miss what was done with rt_cache_flush() : find all cached
> routes and release all dev references...

We can fix this with a two-pronged approach:

1) Walk the FIB info nexthops and invalidate.

2) Entries not cached in the FIB info nexthops go into a
   per-netns list which is scanned as well.

I'll try to work on this if nobody beats me to it.
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