[openib-general] Re: [PATCH]: was Re: LLTX and netif_stop_queue

[David S. Miller]

On Wed, 26 Jan 2005 14:25:12 +0100
Lennert Buytenhek <buytenh at wantstofly.org> 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.