# Re: \[PATCH RFC v2 00/12\] socket sendmsg MSG\_ZEROCOPY

- From: Eric Dumazet \<hidden\>
- Date: 2017-02-28 21:50:15 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2017/02/11046273
- Thread: https://ratatoskr.run/netdev/2017/02/11046264/t.md

```text
On Tue, 2017-02-28 at 13:09 -0800, Andy Lutomirski wrote:

> Does this mean that a user program that does a zerocopy send can cause
> a retransmitted segment to contain different data than the original
> segment?  If so, is that okay?

Same remark applies to sendfile() already, or other zero copy modes
(vmsplice() + splice() )
```