[Cerowrt-devel] Fwd: [RFC net-next] net: extend netdev features

Toke Høiland-Jørgensen toke at toke.dk
Sun Jul 11 15:57:11 EDT 2021

Dave Taht <dave.taht at gmail.com> writes:

> One thing somewhat related to this was finally expanding the space
> available for the tc and iptables functionality for
> things like hashing and actions etc from 16 bits to 32. That is
> something of a fork lift upgrade, but... 64k queues is not
> enough in some cases, nor is 64k possible users in libreqos. thoughts

skb->hash is 32 bits already. There is hardware out there that does
64-bit hashing, promising to hash packets in a way that basically
guarantees the hash to be a globally unique flow identifier. Supporting
*that* in the kernel would need some work, though... :)


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