From: "Zi Yan" <ziy@nvidia.com>
To: "Nico Pache (Red Hat)" <nico.pache@linux.dev>,
<linux-mm@kvack.org>, <linux-kernel@vger.kernel.org>,
<linux-doc@vger.kernel.org>
Cc: "Andrew Morton" <akpm@linux-foundation.org>,
"David Hildenbrand" <david@kernel.org>,
"Lorenzo Stoakes" <ljs@kernel.org>,
"Baolin Wang" <baolin.wang@linux.alibaba.com>,
"Liam R. Howlett" <liam@infradead.org>,
"Ryan Roberts" <ryan.roberts@arm.com>,
"Dev Jain" <dev.jain@arm.com>, "Barry Song" <baohua@kernel.org>,
"Lance Yang" <lance.yang@linux.dev>,
"Usama Arif" <usama.arif@linux.dev>,
"Vlastimil Babka" <vbabka@kernel.org>,
"Mike Rapoport" <rppt@kernel.org>,
"Suren Baghdasaryan" <surenb@google.com>,
"Michal Hocko" <mhocko@suse.com>,
"Jonathan Corbet" <corbet@lwn.net>,
"Shuah Khan" <skhan@linuxfoundation.org>
Subject: Re: [PATCH v4 2/7] mm/khugepaged: extract reference check into folio_pte_referenced() helper
Date: Tue, 11 Aug 2026 16:45:15 -0400 [thread overview]
Message-ID: <DKMEPASDM0ZN.3NJEFGFDDFFE7@nvidia.com> (raw)
In-Reply-To: <20260811-khugepaged_pte_refactor-v4-2-ddac39d61c4a@linux.dev>
On Tue Aug 11, 2026 at 8:48 AM EDT, Nico Pache (Red Hat) wrote:
> This change deduplicates the "is this PTE/folio referenced enough to be
> considered for a collapse" condition that was repeated in both
> __collapse_huge_page_isolate() and collapse_scan_pmd(), extracting it into
> a single inline helper function.
>
> Also move the comment and use it as the function header. While we are at
> it, updated the comment to clarify that a young pte is a recently accessed
> one.
>
> Acked-by: Usama Arif <usama.arif@linux.dev>
> Signed-off-by: Nico Pache (Red Hat) <nico.pache@linux.dev>
> ---
> mm/khugepaged.c | 32 ++++++++++++++++++--------------
> 1 file changed, 18 insertions(+), 14 deletions(-)
>
LGTM.
Reviewed-by: Zi Yan <ziy@nvidia.com>
--
Best Regards,
Yan, Zi
next prev parent reply other threads:[~2026-08-11 20:45 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-11 12:48 [PATCH v4 0/7] mm/khugepaged: several cleanups Nico Pache (Red Hat)
2026-08-11 12:48 ` [PATCH v4 1/7] mm/khugepaged: refactor per-scan state clearing into collapse_control_init_scan() Nico Pache (Red Hat)
2026-08-11 12:48 ` [PATCH v4 2/7] mm/khugepaged: extract reference check into folio_pte_referenced() helper Nico Pache (Red Hat)
2026-08-11 15:47 ` David Hildenbrand (Arm)
2026-08-11 20:45 ` Zi Yan [this message]
2026-08-11 12:48 ` [PATCH v4 3/7] mm/khugepaged: introduce a count_collapse_event() helper Nico Pache (Red Hat)
2026-08-11 20:45 ` Zi Yan
2026-08-11 12:48 ` [PATCH v4 4/7] mm/khugepaged: fix outdated comments Nico Pache (Red Hat)
2026-08-11 20:48 ` Zi Yan
2026-08-11 12:48 ` [PATCH v4 5/7] mm/khugepaged: Refactor the PTE state checks into a helper Nico Pache (Red Hat)
2026-08-12 2:04 ` Zi Yan
2026-08-11 12:48 ` [PATCH v4 6/7] mm/khugepaged: unmap pte before releasing vma write lock Nico Pache (Red Hat)
2026-08-11 20:54 ` Zi Yan
2026-08-11 12:48 ` [PATCH v4 7/7] mm: Documentation: clarify where the mTHP stats live Nico Pache (Red Hat)
2026-08-11 20:54 ` Zi Yan
2026-08-11 18:23 ` [PATCH v4 0/7] mm/khugepaged: several cleanups Andrew Morton
2026-08-11 18:55 ` David Hildenbrand (Arm)
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