Re: [RFC][PATCH 2/9] deadlock prevention core

David Miller
2006-08-09T01:39:20Z

> Can you please characterize the conditions under which skb->dev changes
> after the alloc? Are there writings on this subtlety?

The packet scheduler and classifier can redirect packets to different
devices, and can the netfilter layer.

The setting of skb->dev is wholly transient and you cannot rely upon
it to be the same as when you set it on allocation.

Even simple things like the bonding device change skb->dev on every
receive.

I think you need to study the networking stack a little more before
you continue to play in this delicate area :-)