Re: [patch net-next v2 01/15] net: introduce upper device lists

[David Miller]

From: Ben Hutchings <bhutchings@xxxxxxxxxxxxxx>
Date: Tue, 14 Aug 2012 23:33:44 +0100

> I think we will also need to limit the depth of the device stack so we
> don't run out of stack space here.  __netif_receive() implements a kind
> of tail recursion whenever a packet is passed up, but
> __netdev_has_upper_dev() can't avoid doing real recursion (without the
> addition of a flag to net_device so it can mark its progress).

Agreed, we need some kind of limit here.
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