Re: [RFC PATCH 57/57] MAINTAINERS: add an entry for collapse

["Lorenzo Stoakes (ARM)" <ljs@kernel.org>]

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.

>  MEMORY MANAGEMENT - CORE
>  M:	Andrew Morton <akpm@linux-foundation.org>
>  M:	David Hildenbrand <david@kernel.org>
> @@ -17272,12 +17286,7 @@ T:	git git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
>  F:	Documentation/ABI/testing/sysfs-kernel-mm-transparent-hugepage
>  F:	Documentation/admin-guide/mm/transhuge.rst
>  F:	include/linux/huge_mm.h
> -F:	include/linux/khugepaged.h
> -F:	include/trace/events/collapse.h
>  F:	mm/huge_memory.c
> -F:	mm/khugepaged.c
> -F:	mm/mm_slot.h
> -F:	tools/testing/selftests/mm/khugepaged.c
>  F:	tools/testing/selftests/mm/split_huge_page_test.c
>  F:	tools/testing/selftests/mm/transhuge-stress.c
>
> --
> 2.54.0
>

--
Cheers, Lorenzo