linux-kernel - Re: [PATCH 2/2] MAINTAINERS: add section for locking of mm's and VMAs

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Message-ID: <bxgksbw7qplw3pp7gpve2ir63oyds7mxsnvprz45fj6oadotm5@syvchqjd2n6z>
Date: Tue, 15 Apr 2025 11:37:04 -0400
From: "Liam R. Howlett" <Liam.Howlett@...cle.com>
To: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
        Shakeel Butt <shakeel.butt@...ux.dev>, Jann Horn <jannh@...gle.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Vlastimil Babka <vbabka@...e.cz>, Matthew Wilcox <willy@...radead.org>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        SeongJae Park <sj@...nel.org>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [PATCH 2/2] MAINTAINERS: add section for locking of mm's and VMAs

* Lorenzo Stoakes <lorenzo.stoakes@...cle.com> [250415 09:11]:
> We place this under memory mapping as related to memory mapping
> abstractions in the form of mm_struct and vm_area_struct (VMA). Now we have
> separated out mmap/vma locking logic into the mmap_lock.c and mmap_lock.h
> files, so this should encapsulate the majority of the mm locking logic in
> the kernel.
> 
> Suren is best placed to maintain this logic as the core architect of VMA
> locking as a whole.
> 
> Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
> ---
>  MAINTAINERS | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 8d834514a047..ce55676a16a4 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -15595,6 +15595,21 @@ F:	mm/vma_internal.h
>  F:	tools/testing/selftests/mm/merge.c
>  F:	tools/testing/vma/
>  
> +MEMORY MAPPING - LOCKING
> +M:	Andrew Morton <akpm@...ux-foundation.org>
> +M:	Suren Baghdasaryan <surenb@...gle.com>
> +R:	Liam R. Howlett <Liam.Howlett@...cle.com>
> +R:	Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
> +R:	Vlastimil Babka <vbabka@...e.cz>
> +L:	linux-mm@...ck.org
> +S:	Maintained
> +W:	http://www.linux-mm.org
> +T:	git git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
> +F:	Documentation/mm/process_addrs.rst
> +F:	include/linux/mmap_lock.h
> +F:	include/trace/events/mmap_lock.h
> +F:	mm/mmap_lock.c

It would be good to have more M's here in the case Suren is away or
whatever.

I have worked on the mmap locking due to the maple tree addition, and I
have helped with vma locking in some areas.

Lorenzo wrote the locking document, which Suren pointed out last mmap
lock meeting and does make locking changes.

Are there others that could be M here?

Shakeel and/or Jann might be good additions to this list somewhere
(looking at the edits to the file).

> +
>  MEMORY MAPPING - MADVISE (MEMORY ADVICE)
>  M:	Andrew Morton <akpm@...ux-foundation.org>
>  M:	Liam R. Howlett <Liam.Howlett@...cle.com>
> -- 
> 2.49.0
>