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From: "David Hildenbrand (Arm)" <david@kernel.org>
To: "Lorenzo Stoakes (ARM)" <ljs@kernel.org>,
	Kiryl Shutsemau <kirill@shutemov.name>
Cc: akpm@linux-foundation.org, nico.pache@linux.dev,
	baolin.wang@linux.alibaba.com, baohua@kernel.org,
	dev.jain@arm.com, hughd@google.com, lance.yang@linux.dev,
	liam@infradead.org, mhocko@suse.com, rppt@kernel.org,
	ryan.roberts@arm.com, shuah@kernel.org, surenb@google.com,
	usama.arif@linux.dev, vbabka@kernel.org, ziy@nvidia.com,
	usama.anjum@arm.com, agordeev@linux.ibm.com, linux-mm@kvack.org,
	linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org,
	kas@kernel.org, jannh@google.com, willy@infradead.org,
	pfalcato@suse.de, rostedt@goodmis.org, mhiramat@kernel.org,
	linux-trace-kernel@vger.kernel.org, bpf@vger.kernel.org
Subject: Re: [RFC PATCH 57/57] MAINTAINERS: add an entry for collapse
Date: Mon, 17 Aug 2026 10:08:32 +0200	[thread overview]
Message-ID: <985a5b95-e2af-4603-b2af-973cd634cb59@kernel.org> (raw)
In-Reply-To: <aoLASuFkQ3rUrWa0@lucifer>

On 8/17/26 10:04, Lorenzo Stoakes (ARM) wrote:
> On Sun, Aug 16, 2026 at 11:46:09PM +0100, Kiryl Shutsemau wrote:
>> From: "Kiryl Shutsemau (Meta)" <kas@kernel.org>
>>
>> Collapse is now its own body of code: mm/collapse.c, a header stating what
>> it offers a caller, and its own tracepoint family.  It has two callers,
>> the khugepaged daemon and MADV_COLLAPSE, rather than living inside one of
>> them.
>>
>> Add a section for it, and move what belongs to it out of the THP entry:
>> khugepaged.c and its header, the trace header, the selftests, and
>> mm_slot.h.
>>
>> The selftests are matched as khugepaged*.c, which also covers the race and
>> sync-check harnesses the THP entry did not list.  mm_slot.h stays listed
>> under KSM as well, which is the other user of it.
>>
>> Assisted-by: Claude-Code:claude-opus-5
>> Signed-off-by: Kiryl Shutsemau (Meta) <kas@kernel.org>
>> ---
>>  MAINTAINERS | 19 ++++++++++++++-----
>>  1 file changed, 14 insertions(+), 5 deletions(-)
>>
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index 7c179b333e4e..4e4e5030b979 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -16955,6 +16955,20 @@ T:	git git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
>>  F:	include/linux/balloon.h
>>  F:	mm/balloon.c
>>
>> +MEMORY MANAGEMENT - COLLAPSE
>> +M:	Kiryl Shutsemau <kas@kernel.org>
>> +L:	linux-mm@kvack.org
>> +S:	Maintained
>> +W:	http://www.linux-mm.org
>> +T:	git git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
>> +F:	include/linux/khugepaged.h
>> +F:	include/trace/events/collapse.h
>> +F:	mm/collapse.c
>> +F:	mm/collapse.h
>> +F:	mm/khugepaged.c
>> +F:	mm/mm_slot.h
>> +F:	tools/testing/selftests/mm/khugepaged*.c
>> +
> 
> I'll look through the series properly, but presumably this is a separation of
> the THP collapse logic, and therefore should have the same maintainers/reviewers
> as the rest of THP.

Jup.

-- 
Cheers,

David

  reply	other threads:[~2026-08-17  8:08 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-16 22:45 [RFC PATCH 00/57] mm/collapse: rebuild collapse on migration primitives Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 01/57] mm: add pte_folio() Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 02/57] mm: add pte_none_or_zero() Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 03/57] mm/collapse: add collapse.h for the shared collapse state Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 04/57] mm/collapse: rename mthp_present_ptes to eligible_ptes Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 05/57] mm/collapse: state what a collapse may do in the policy Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 06/57] mm/collapse: move the smallest collapse order to collapse.h Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 07/57] mm/collapse: sketch the new anonymous collapse engine Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 08/57] mm/collapse: scan a table for what a collapse could use Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 09/57] mm/collapse: collect candidate windows into a round Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 10/57] mm/collapse: run a round and feed the outcomes back Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 11/57] mm/collapse: sketch the passes of a round Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 12/57] mm/collapse: allocate a destination per candidate Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 13/57] mm/collapse: revalidate a round against the VMA Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 14/57] mm/collapse: fault the sources in before the freeze Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 15/57] mm/collapse: check what a candidate would freeze Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 16/57] mm/collapse: freeze the sources behind migration entries Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 17/57] mm/collapse: copy the sources into the destinations Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 18/57] mm/collapse: install the destinations at PTE level Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 19/57] mm/collapse: install a PMD leaf as the terminal layer Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 20/57] mm/collapse: put the sources back Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 21/57] mm/collapse: settle whatever the round reached Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 22/57] mm/collapse: walk a table with a selection cursor Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 23/57] mm/collapse: give a refused region a second chance Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 24/57] mm/collapse: report each candidate's outcome to tracing Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 25/57] mm/collapse: collapse anonymous memory with the new engine Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 26/57] mm/collapse: give collapse_single_pmd() the range to work on Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 27/57] mm/collapse: scan the windows a VMA can hold Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 28/57] mm/collapse: remove the mechanism the engine replaces Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 29/57] mm/collapse: move what a collapse is judged on into collapse.c Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 30/57] mm/collapse: name the max_ptes ceiling after collapse Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 31/57] mm/khugepaged: count collapses where khugepaged makes them Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 32/57] mm/collapse: move the file collapse into collapse.c Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 33/57] mm/collapse: split collapse into a scan and a run Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 34/57] mm/collapse: implement MADV_COLLAPSE in madvise.c Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 35/57] mm/madvise: drop MADV_COLLAPSE's redundant mm reference Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 36/57] mm/collapse: report what the scan found Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 37/57] mm/collapse: report what the fault-in pass paid Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 38/57] mm/collapse: report the round, and what it made faulters wait Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 39/57] mm/collapse: name the file collapse's tracepoints after collapse Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 40/57] mm/collapse: remove the tracepoints of the mechanism that is gone Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 41/57] mm/collapse: give collapse its own trace header Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 42/57] mm/collapse: allow error injection into the freeze Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 43/57] mm/khugepaged: check the scan budget before the work, not after Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 44/57] mm/khugepaged: hold the address space open across a scan Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 45/57] mm/collapse: take a per-VMA read lock for the round Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 46/57] mm/khugepaged: scan under a per-VMA read lock Kiryl Shutsemau
2026-08-16 22:45 ` [RFC PATCH 47/57] mm/madvise: collapse " Kiryl Shutsemau
2026-08-16 22:46 ` [RFC PATCH 48/57] mm/collapse: assert the mm reference the engine relies on Kiryl Shutsemau
2026-08-16 22:46 ` [RFC PATCH 49/57] mm/khugepaged: drop the mmap_lock barrier from __khugepaged_exit() Kiryl Shutsemau
2026-08-16 22:46 ` [RFC PATCH 50/57] selftests/mm: attribute collapses by candidate event alone Kiryl Shutsemau
2026-08-16 22:46 ` [RFC PATCH 51/57] selftests/mm: cover collapse inside a sub-PMD VMA Kiryl Shutsemau
2026-08-16 22:46 ` [RFC PATCH 52/57] selftests/mm: cover a hole-y window in " Kiryl Shutsemau
2026-08-16 22:46 ` [RFC PATCH 53/57] selftests/mm: cover collapse of mlocked ranges Kiryl Shutsemau
2026-08-16 22:46 ` [RFC PATCH 54/57] selftests/mm: cover collapse beside a MADV_FREE'd page Kiryl Shutsemau
2026-08-16 22:46 ` [RFC PATCH 55/57] selftests/mm: cover collapse beside a pinned page Kiryl Shutsemau
2026-08-16 22:46 ` [RFC PATCH 56/57] selftests/mm: cover the scaled max_ptes_shared limit Kiryl Shutsemau
2026-08-16 22:46 ` [RFC PATCH 57/57] MAINTAINERS: add an entry for collapse Kiryl Shutsemau
2026-08-17  8:04   ` Lorenzo Stoakes (ARM)
2026-08-17  8:08     ` David Hildenbrand (Arm) [this message]
2026-08-17 10:12       ` Kiryl Shutsemau
2026-08-17  2:02 ` [RFC PATCH 00/57] mm/collapse: rebuild collapse on migration primitives Zi Yan
2026-08-17 10:07   ` Kiryl Shutsemau
2026-08-17  8:52 ` Lorenzo Stoakes (ARM)

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