Den tors 27 sep. 2018 kl 02:56 skrev Rob Sherwood <rob.sherwood@xxxxxxxxx>: > > Thanks for the reference and the page-per-packet point makes sense. > At the same time, not supporting jumbo frames seems like a non-trivial > limitation. Are there a subset of drivers that do support jumbo > frames (or LRO or the other features that require multiple pages per > packet)? > No, not at the moment. XDP has a strict "one frame cannot exceed a page" constraint. Everything that applies to XDP in terms of constraints, applies to AF_XDP as well. Just to clarify, XDP supports jumbo frames -- i.e. larger than 1500B payload, just not the maximum 9000B size. My personal observation is that many deployments that "require jumbo frames", are usually OK with an of MTU ~3000B. Jumbo frames, yes. Full jumbo frames, no. :-) Cheers, Björn > Thanks in advance, > > - Rob > . > On Tue, Sep 25, 2018 at 9:44 AM Alex Forster <aforster@xxxxxxxxxxxxxx> wrote: > > > > > On my test box running 4.18 if XDP is in use the MTU can not be set higher than 3050. > > > > Ah, that answers a few questions for me. Thanks! > > > > Alex Forster
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