On 04/11/2013 23:17, Wendy Cheng wrote:
Look to me that the "segmentation offload" (TSO) and "receive offload (GSO) are 
mutual exclusive ?

Wendy, the problem Markus stepped on was no GRO on the receive side b/c of bad ID-ing of packets on the sender side during the TSO process.

GSO is SW TSO, has nothing to do with GRO.

The code you referred two probably protects against an skb attempting to go through both TSO/GSO and GRO
(e.g on forwarding) which isn't the case here.
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