Re: [PATCH net-next 05/15] ipv6/gso: remove temporary HBH/jumbo header

On Thu, Feb 3, 2022 at 4:05 PM Alexander Duyck
[off-list ref] wrote:

I get that. What I was getting at was that we might be able to process
it in ipv6_gso_segment before we hand it off to either TCP or UDP gso
handlers to segment.

The general idea being we keep the IPv6 specific bits in the IPv6
specific code instead of having the skb_segment function now have to
understand IPv6 packets. So what we would end up doing is having to do
an skb_cow to replace the skb->head if any clones might be holding on
it, and then just chop off the HBH jumbo header before we start the
segmenting.

The risk would be that we waste cycles removing the HBH header for a
frame that is going to fail, but I am not sure how likely a scenario
that is or if we need to optimize for that.

I guess I can try this for the next version, thanks.