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From:   Toke =?utf-8?Q?H=C3=B8iland-J=C3=B8rgensen?= <toke@redhat.com>
To:     Kal Conley <kal.conley@dectris.com>,
        =?utf-8?B?QmrDtnJuIFTDtnBlbA==?= <bjorn@kernel.org>,
        Magnus Karlsson <magnus.karlsson@intel.com>,
        Maciej Fijalkowski <maciej.fijalkowski@intel.com>,
        Jonathan Lemon <jonathan.lemon@gmail.com>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Jonathan Corbet <corbet@lwn.net>,
        Alexei Starovoitov <ast@kernel.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Jesper Dangaard Brouer <hawk@kernel.org>,
        John Fastabend <john.fastabend@gmail.com>
Cc:     Kal Conley <kal.conley@dectris.com>, netdev@vger.kernel.org,
        bpf@vger.kernel.org, linux-doc@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH bpf-next v3 1/3] xsk: Support UMEM chunk_size > PAGE_SIZE
In-Reply-To: <20230406130205.49996-2-kal.conley@dectris.com>
References: <20230406130205.49996-1-kal.conley@dectris.com>
 <20230406130205.49996-2-kal.conley@dectris.com>
Date:   Thu, 06 Apr 2023 20:38:05 +0200
Message-ID: <87sfdckgaa.fsf@toke.dk>
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Kal Conley <kal.conley@dectris.com> writes:

> Add core AF_XDP support for chunk sizes larger than PAGE_SIZE. This
> enables sending/receiving jumbo ethernet frames up to the theoretical
> maxiumum of 64 KiB. For chunk sizes > PAGE_SIZE, the UMEM is required
> to consist of HugeTLB VMAs (and be hugepage aligned). Initially, only
> SKB mode is usable pending future driver work.

Hmm, interesting. So how does this interact with XDP multibuf?

-Toke