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Subject: Re: [PATCH v8 bpf-next 0/5] xsk: build skb by page (aka generic
 zerocopy xmit)
To:     Alexander Lobakin <alobakin@pm.me>,
        Magnus Karlsson <magnus.karlsson@intel.com>
Cc:     "Michael S. Tsirkin" <mst@redhat.com>,
        Jason Wang <jasowang@redhat.com>,
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References: <20210218204908.5455-1-alobakin@pm.me>
From:   Daniel Borkmann <daniel@iogearbox.net>
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On 2/18/21 9:49 PM, Alexander Lobakin wrote:
> This series introduces XSK generic zerocopy xmit by adding XSK umem
> pages as skb frags instead of copying data to linear space.
> The only requirement for this for drivers is to be able to xmit skbs
> with skb_headlen(skb) == 0, i.e. all data including hard headers
> starts from frag 0.
> To indicate whether a particular driver supports this, a new netdev
> priv flag, IFF_TX_SKB_NO_LINEAR, is added (and declared in virtio_net
> as it's already capable of doing it). So consider implementing this
> in your drivers to greatly speed-up generic XSK xmit.
[...]

Applied, thanks!