On Wed, 26 Jan 2005 14:25:12 +0100
Lennert Buytenhek [off-list ref] wrote:

I've thought about this a bit, and the only sane way of doing recursion
detection that doesn't involve 'struct net_device' would be to keep track
of the recursion depth (perhaps per-CPU as you suggest) and tossing the
packet when it exceeds some random value, right?

Yes, that's the idea.

To reproduce the current behaviour more closely you'd have to keep a
small per-CPU array of 'struct net_device *' pointers as a kind of
recursion stack, and toss the packet when you hit a net_device that's
already on the list.  But that seems like slight overkill.

Indeed.