Subject: Re: [PATCH net-next] skbuff: Optimize SKB coalescing for page pool case

From: Jakub Kicinski <[email-masked]>
Date: Mon, 3 Jul 2023 11:53:26 -0700

On Mon, 3 Jul 2023 17:12:46 +0800 Liang Chen wrote:
> As for the "pp" reference, it has the test
> page_pool_is_pp_page_frag(head_page) there. So for a non-frag pp page,
> it will be a get_page call.

You don't understand - you can't put a page from a page pool in two
skbs with pp_recycle set, unless the page is frag'ed.