Re: [PATCH net-next v5 00/19] splice, net: Replace sendpage with sendmsg(MSG_SPLICE_PAGES), part 1

[Eric Dumazet]

On Thu, Apr 6, 2023 at 11:42 AM David Howells <dhowells@xxxxxxxxxx> wrote:
>
> Here's the first tranche of patches towards providing a MSG_SPLICE_PAGES
> internal sendmsg flag that is intended to replace the ->sendpage() op with
> calls to sendmsg().  MSG_SPLICE is a hint that tells the protocol that it
> should splice the pages supplied if it can and copy them if not.
>

I find this patch series quite big/risky for 6.4

Can you spell out why we need "unspliceable pages support" ?
This seems to add quite a lot of code in fast paths.
Thanks.