Re: [PATCH v3 net-next 1/4] net: implement support for low latencysocket polling

From: Eric Dumazet
Date: Tue May 21 2013 - 13:48:25 EST

On Tue, 2013-05-21 at 19:02 +0200, Pekka Riikonen wrote:

> Maybe even that's not needed. Couldn't skb->queue_mapping give the
> correct NAPI instance in multiqueue nics? The NAPI instance could be made
> easily available from skb->dev. In any case an index is much better than
> a new pointer.

We do not keep skb->dev information once a packet leaves the rcu
protected region.

Once packet is queued to tcp input queues, skb->dev is NULL.

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