# Re: \[PATCH v8 bpf-next 0/5\] xsk: build skb by page (aka generic zerocopy xmit)

- From: Daniel Borkmann \<daniel@iogearbox.net\>
- Date: 2021-02-25 00:47:40 
- List: virtualization
- Page: https://ratatoskr.run/virtualization/2021/02/6278395
- Thread: https://ratatoskr.run/netdev/2021/02/6273386/t.md

```text
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!
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```