> > This patch defines new RSS offload type for IPv4 checksum, which is > > required when users want to distribute packets based on the IPv4 > > checksum field. > > > > For example "flow create 0 ingress pattern eth / ipv4 / end actions > > rss types ipv4-chksum end queues end / end", this flow causes all > > matching packets to be distributed to queues on basis of IPv4 > > checksum. > > > > Signed-off-by: Alvin Zhang <alvinx.zh...@intel.com> > > The patch LGTM now. I hope we'll have a PMD in the release cycle which > supports it. > > In fact it is a funny idea. Let's consider a TCP connection and routing change > with one extra hop on the way while the connection is alive. Or a UDP stream > in > the same conditions. If so, TTL will different, checksum changes and > connection > packets may be delivered to a different Rx queue. > May be sometimes it is not important and/or can't happen. > > L4 checksum sounds better from this point of view since it covers IP addresses > and transport ports and less bits to hash. The only concern is distribution > fairness, > but I keep the topic to those who understand corresponding math better. > > > ---
We are preparing a PMD patch to support this feature, if ready, we will submit it ASAP. Thanks, Alvin
