On Sat, 2020-11-21 at 17:52 +0100, Florian Westphal wrote:

Aleksandr, why was this made into an skb extension in the first place?

AFAIU this feature is usually always disabled at build time.
For debug builds (test farm /debug kernel etc) its always needed.

If thats the case this u64 should be an sk_buff member, not an
extension.

Because it was requested :-)

https://lore.kernel.org/netdev/20201009161558.57792e1a@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com/ (local)

johannes