On Thu, Jun 14, 2018 at 4:58 PM, David Miller <davem@xxxxxxxxxxxxx> wrote: > From: Tom Herbert <tom@xxxxxxxxxxxxxxx> > Date: Thu, 14 Jun 2018 13:52:03 -0700 > >> IIRC, there was a similar proposal a while back that want to bundle >> packets of the same flow together (without doing GRO) so that they >> could be processed by various functions by looking at just one >> representative packet in the group. The concept had some promise, but >> in the end it created quite a bit of complexity since at some point >> the packet bundle needed to be undone to go back to processing the >> individual packets. > > You're probably talking about Edward Cree's SKB list stuff, and as > per his presenation at netconf 2 weeks ago he plans to revitalize > it given how Spectre et al. gives cause to reevaluate all bulking > techniques.nearly The use case for that will be an interesting question. GSO/GRO solves the problem for TCP and this extends to nearly all cases where TCP is in an encapsulated packet. Super efficient forwarding can be done in XDP/BPF (without needing overhead of GSO/GRO). That pretty much leaves UDP as non-encapsulation end protocol, which I guess these days pretty much means QUIC :-) I am still interested to see if we can implement GSO/GRO for QUIC (via a generic GSO/GRO BPF function so we don't hardcode any QUIC protocol or other application protocols in kernel). Tom -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
