Hi, We would love to adopt AF_XDP with ZC (with i40e), however, we are a blocked by the lack of full jumbo frame support (8000-9000 bytes). I would like to get a feel for the feasibility of implementing support for this. Looking through the code it seems possible to support this through huge pages without a huge amount of effort (i may be wrong). The first thing that came to mind is something like: (1) Add a page_size (or similar) field to the xdp_umem struct. (2) During UMEM registration, check if the UMEM is only made up of huge pages, if so, save the huge page size into the umem page_size field instead of the default constant PAGE_SIZE value. (3) Use the umem page size (for dma mapping etc.) instead of the fixed standard PAGE_SIZE. Would this be a feasible solution? At least from the user (space) perspective, this seems like relatively straightforward change: when allocating the umem buffer, they only need to call mmap with the appropriate huge page flags if they want to receive packets > PAGE_SIZE. Thanks, Kal
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