On Mon, 12 Nov 2012, Joseph Gasparakis wrote:
> The series contains updates to add in the NIC Rx and Tx checksumming support > for encapsulated packets. > > The sk_buff needs to somehow have information of the inner packet, and adding > three fields for the inner mac, network and transport headers was the prefered > approach. > > Not adding these fields would mean that the drivers would need to parse the > sk_buff data in hot-path, having a negative impact in the performance. > > Adding in sk_buff a pointer to the skbuff of the inner packet made sense, but > would be a complicated change as assumptions needed to be made with regards to > helper functions such as skb_clone() skb_copy(). Also code for the existing > encapsulation protocols (such as VXLAN and IP GRE) had to be reworked, so the > decision was to have the simple approach of adding these three fields. > > v2 Makes sure that checksumming for IP GRE does not take place if the offload > flag is set in the skb's netdev features > Thank you all. I am working now on implementing a demo using ixgbe and will re-submit soon this series of patches taking into consideration any open comments. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
