From: "Zi Yan" <ziy@nvidia.com>
To: "Kiryl Shutsemau" <kirill@shutemov.name>,
"Andrew Morton" <akpm@linux-foundation.org>,
"David Hildenbrand" <david@kernel.org>,
"Lorenzo Stoakes" <ljs@kernel.org>
Cc: <linux-mm@kvack.org>, <linux-kernel@vger.kernel.org>,
<kernel-team@meta.com>,
"Baolin Wang" <baolin.wang@linux.alibaba.com>,
"Liam R . Howlett" <liam@infradead.org>,
"Nico Pache" <nico.pache@linux.dev>,
"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>,
"Jann Horn" <jannh@google.com>,
"Kiryl Shutsemau (Meta)" <kas@kernel.org>
Subject: Re: [PATCH 02/12] mm/khugepaged: count collapses where khugepaged makes them
Date: Fri, 04 Sep 2026 22:25:54 -0400 [thread overview]
Message-ID: <DL70Z6ZM3ORM.104CN64UDYXPL@nvidia.com> (raw)
In-Reply-To: <ef229484e454d804ffbdbf8ae87798919594fd1b.1788533997.git.kas@kernel.org>
On Fri Sep 4, 2026 at 11:10 AM EDT, Kiryl Shutsemau wrote:
> From: "Kiryl Shutsemau (Meta)" <kas@kernel.org>
>
> collapse_single_pmd() bumps khugepaged_pages_collapsed for its caller, and
> tests cc->is_khugepaged to know whether it should: the counter belongs to
> the daemon, and MADV_COLLAPSE must not touch it.
>
> The daemon sees every result of every collapse it asks for, so it can keep
> its own counter without the shared path testing who called.
>
> Assisted-by: Claude-Code:claude-opus-5
> Signed-off-by: Kiryl Shutsemau (Meta) <kas@kernel.org>
> ---
> mm/khugepaged.c | 11 ++++-------
> 1 file changed, 4 insertions(+), 7 deletions(-)
>
LGTM.
Reviewed-by: Zi Yan <ziy@nvidia.com>
--
Best Regards,
Yan, Zi
next prev parent reply other threads:[~2026-09-05 2:26 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-04 15:10 [PATCH 00/12] mm/collapse: separate a collapse from its callers Kiryl Shutsemau
2026-09-04 15:10 ` [PATCH 01/12] mm/khugepaged: drop redundant mm_struct pin in madvise_collapse() Kiryl Shutsemau
2026-09-04 15:58 ` Zi Yan
2026-09-07 7:33 ` Baolin Wang
2026-09-04 15:10 ` [PATCH 02/12] mm/khugepaged: count collapses where khugepaged makes them Kiryl Shutsemau
2026-09-05 2:25 ` Zi Yan [this message]
2026-09-07 7:40 ` Baolin Wang
2026-09-04 15:10 ` [PATCH 03/12] mm/khugepaged: rename mthp_present_ptes bitmap to eligible_ptes Kiryl Shutsemau
2026-09-05 2:28 ` Zi Yan
2026-09-07 7:54 ` Baolin Wang
2026-09-07 10:35 ` Kiryl Shutsemau
2026-09-04 15:10 ` [PATCH 04/12] mm/collapse: add collapse.h for the collapse interface Kiryl Shutsemau
2026-09-05 2:36 ` Zi Yan
2026-09-07 10:41 ` Kiryl Shutsemau
2026-09-07 8:04 ` Baolin Wang
2026-09-04 15:10 ` [PATCH 05/12] mm/collapse: state what a collapse may do in the policy Kiryl Shutsemau
2026-09-05 2:44 ` Zi Yan
2026-09-07 10:49 ` Kiryl Shutsemau
2026-09-07 19:40 ` Zi Yan
2026-09-07 9:05 ` Baolin Wang
2026-09-07 10:56 ` Kiryl Shutsemau
2026-09-08 1:48 ` Baolin Wang
2026-09-04 15:10 ` [PATCH 06/12] mm/collapse: drop the collapse_possible() wrapper Kiryl Shutsemau
2026-09-05 2:45 ` Zi Yan
2026-09-07 8:28 ` Baolin Wang
2026-09-04 15:10 ` [PATCH 07/12] mm/collapse: name the per-table scan reset for what it resets Kiryl Shutsemau
2026-09-05 18:05 ` Zi Yan
2026-09-07 8:31 ` Baolin Wang
2026-09-04 15:10 ` [PATCH 08/12] mm/collapse: separate scanning a PTE table from collapsing it Kiryl Shutsemau
2026-09-06 2:30 ` Zi Yan
2026-09-07 11:34 ` Kiryl Shutsemau
2026-09-04 15:10 ` [PATCH 09/12] mm/collapse: open-code collapse_single_pmd() in its two callers Kiryl Shutsemau
2026-09-04 15:10 ` [PATCH 10/12] mm/collapse: work out the orders a VMA allows once per VMA Kiryl Shutsemau
2026-09-04 15:10 ` [PATCH 11/12] mm/collapse: declare the collapse interface in collapse.h Kiryl Shutsemau
2026-09-04 15:10 ` [PATCH 12/12] mm/collapse: implement MADV_COLLAPSE in madvise.c Kiryl Shutsemau
2026-09-06 0:23 ` [PATCH 00/12] mm/collapse: separate a collapse from its callers Andrew Morton
2026-09-07 10:28 ` Kiryl Shutsemau
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