linux-kernel - Re: [PATCH V2 3/5] mm/khugepaged: change collapse_pte_mapped

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Message-ID: <7A313858-704B-4E3F-8133-020213D108AB@nvidia.com>
Date: Mon, 29 Dec 2025 11:40:56 -0500
From: Zi Yan <ziy@...dia.com>
To: Shivank Garg <shivankg@....com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
 David Hildenbrand <david@...nel.org>,
 Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
 Baolin Wang <baolin.wang@...ux.alibaba.com>,
 "Liam R . Howlett" <Liam.Howlett@...cle.com>, Nico Pache <npache@...hat.com>,
 Ryan Roberts <ryan.roberts@....com>, Dev Jain <dev.jain@....com>,
 Barry Song <baohua@...nel.org>, Lance Yang <lance.yang@...ux.dev>,
 linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2 3/5] mm/khugepaged: change collapse_pte_mapped_thp() to
 return void

On 24 Dec 2025, at 6:13, Shivank Garg wrote:

> The only external caller of collapse_pte_mapped_thp() is uprobe, which
> ignores the return value. Change the external API to return void to
> simplify the interface.
>
> Introduce try_collapse_pte_mapped_thp() for internal use that preserves
> the return value. This prepares for future patch that will convert
> the return type to use enum scan_result.
>
> Suggested-by: David Hildenbrand (Red Hat) <david@...nel.org>
> Signed-off-by: Shivank Garg <shivankg@....com>
> ---
>  include/linux/khugepaged.h |  9 ++++-----
>  mm/khugepaged.c            | 40 ++++++++++++++++++++++----------------
>  2 files changed, 27 insertions(+), 22 deletions(-)
>
LGTM.
Reviewed-by: Zi Yan <ziy@...dia.com>

--
Best Regards,
Yan, Zi