linux-kernel - Re: [PATCHv4 02/14] mm: Change the interface of prep_compound

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Message-ID: <D842AD70-03DC-48C6-8807-4A004B98A012@nvidia.com>
Date: Wed, 21 Jan 2026 11:32:12 -0500
From: Zi Yan <ziy@...dia.com>
To: Kiryl Shutsemau <kas@...nel.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
 Muchun Song <muchun.song@...ux.dev>, David Hildenbrand <david@...nel.org>,
 Matthew Wilcox <willy@...radead.org>, Usama Arif <usamaarif642@...il.com>,
 Frank van der Linden <fvdl@...gle.com>, Oscar Salvador <osalvador@...e.de>,
 Mike Rapoport <rppt@...nel.org>, Vlastimil Babka <vbabka@...e.cz>,
 Lorenzo Stoakes <lorenzo.stoakes@...cle.com>, Baoquan He <bhe@...hat.com>,
 Michal Hocko <mhocko@...e.com>, Johannes Weiner <hannes@...xchg.org>,
 Jonathan Corbet <corbet@....net>, kernel-team@...a.com, linux-mm@...ck.org,
 linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org
Subject: Re: [PATCHv4 02/14] mm: Change the interface of prep_compound_tail()

On 21 Jan 2026, at 11:22, Kiryl Shutsemau wrote:

> Instead of passing down the head page and tail page index, pass the tail
> and head pages directly, as well as the order of the compound page.
>
> This is a preparation for changing how the head position is encoded in
> the tail page.
>
> Signed-off-by: Kiryl Shutsemau <kas@...nel.org>
> Reviewed-by: Muchun Song <muchun.song@...ux.dev>
> ---
>  include/linux/page-flags.h |  4 +++-
>  mm/hugetlb.c               |  8 +++++---
>  mm/internal.h              | 12 ++++++------
>  mm/mm_init.c               |  2 +-
>  mm/page_alloc.c            |  2 +-
>  5 files changed, 16 insertions(+), 12 deletions(-)
>
Reviewed-by: Zi Yan <ziy@...dia.com>

Best Regards,
Yan, Zi