netdev - Re: [PATCH net-next RFC WIP] Patch for XDP support for virtio

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Message-ID: <20161028214228.7200fef2@jkicinski-Precision-T1700>
Date:   Fri, 28 Oct 2016 21:42:28 +0100
From:   Jakub Kicinski <kubakici@...pl>
To:     Alexander Duyck <alexander.duyck@...il.com>
Cc:     Alexei Starovoitov <alexei.starovoitov@...il.com>,
        John Fastabend <john.fastabend@...il.com>,
        David Miller <davem@...emloft.net>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        shrijeet@...il.com, Tom Herbert <tom@...bertland.com>,
        Netdev <netdev@...r.kernel.org>,
        Shrijeet Mukherjee <shm@...ulusnetworks.com>,
        roopa <roopa@...ulusnetworks.com>, nikolay@...ulusnetworks.com
Subject: Re: [PATCH net-next RFC WIP] Patch for XDP support for virtio_net

On Fri, 28 Oct 2016 13:35:02 -0700, Alexander Duyck wrote:
> > At the same time XDP doesn't require to use 4k buffer in something like Netronome.
> > If xdp bpf program can be offloaded into HW with 1800 byte buffers, great!  
> 
> So are you saying this is only really meant to be used with a full bpf
> hardware offload then?

I think Alexei just meant to say I don't have to worry about providing
4k buffers when program is offloaded but on the host a page is the
memory granularity for XDP...