On Sat, Mar 9, 2024 at 4:35 PM Richard Gobert <richardbgobert@xxxxxxxxx> wrote:
>
> {inet,ipv6}_gro_receive functions perform flush checks (ttl, flags,
> iph->id, ...) against all packets in a loop. These flush checks are
> relevant only to tcp flows, and as such they're used to determine whether
> the packets can be merged later in tcp_gro_receive.
>
> These checks are not relevant to UDP packets.
I do not think this claim is true.
Incoming packets -> GRO -> GSO -> forwarded packets
The {GRO,GSO} step must be transparent, GRO is not LRO.
