Bug#599816: Nested GRE locking bug
From: Eric Dumazet <email@example.com>
Date: Thu, 14 Oct 2010 06:11:59 +0200
> net-next-2.6 contains a fix for this, adding the perc_cpu
> xmit_recursion limit. We might push it to net-2.6
We need to think a bit more about this.
We are essentially now saying that one can only configure
tunnels 3 levels deep, and no more.
I can guarentee you someone out there uses at least 4,
And those people will be broken by the new limit.
So putting this into net-2.6 with such a low limit will
be quite dangerous.