Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx> wrote: > Yes, this is implicit case: skb is gso. This is adding an exception > for sctp-gso. Is that because sctp gso carries a new / distinct sctp header per frag? If so, we can't extend skb_zerocopy, as it would create a bogus packet. The only "speedup" we could do in that case is that we do not need to fix the header csum if userspace enabled GSO support as long as we indicate csum correctness via the NFQA_SKB_CSUMNOTREADY flag. But that should probably be done at a later time.