Re: [PATCH v5] mm: introduce a new page type for page pool in page type

[Jakub Kicinski]

On Tue, 17 Mar 2026 07:31:13 +0900 Byungchul Park wrote:
> Currently, the condition 'page->pp_magic == PP_SIGNATURE' is used to
> determine if a page belongs to a page pool.  However, with the planned
> removal of @pp_magic, we should instead leverage the page_type in struct
> page, such as PGTY_netpp, for this purpose.
> 
> Introduce and use the page type APIs e.g. PageNetpp(), __SetPageNetpp(),
> and __ClearPageNetpp() instead, and remove the existing APIs accessing
> @pp_magic e.g. page_pool_page_is_pp(), netmem_or_pp_magic(), and
> netmem_clear_pp_magic().
> 
> Plus, add @page_type to struct net_iov at the same offset as struct page
> so as to use the page_type APIs for struct net_iov as well.  While at it,
> reorder @type and @owner in struct net_iov to avoid a hole and
> increasing the struct size.

Acked-by: Jakub Kicinski <kuba@xxxxxxxxxx>