linux-kernel - Re: [PATCH v14 0/8] Rust support for mm_struct, vm_area

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Message-ID: <30ffd737-d0aa-44aa-a647-686e536ac548@lucifer.local>
Date: Fri, 14 Feb 2025 12:20:18 +0000
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: Alice Ryhl <aliceryhl@...gle.com>
Cc: "Liam R. Howlett" <Liam.Howlett@...cle.com>,
        Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
        Miguel Ojeda <ojeda@...nel.org>, Matthew Wilcox <willy@...radead.org>,
        Vlastimil Babka <vbabka@...e.cz>, John Hubbard <jhubbard@...dia.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arnd Bergmann <arnd@...db.de>, Jann Horn <jannh@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Alex Gaynor <alex.gaynor@...il.com>, Boqun Feng <boqun.feng@...il.com>,
        Gary Guo <gary@...yguo.net>,
        Björn Roy Baron <bjorn3_gh@...tonmail.com>,
        Benno Lossin <benno.lossin@...ton.me>,
        Andreas Hindborg <a.hindborg@...nel.org>,
        Trevor Gross <tmgross@...ch.edu>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, rust-for-linux@...r.kernel.org,
        Balbir Singh <balbirs@...dia.com>
Subject: Re: [PATCH v14 0/8] Rust support for mm_struct, vm_area_struct, and
 mmap

On Fri, Feb 14, 2025 at 12:56:29PM +0100, Alice Ryhl wrote:
> On Thu, Feb 13, 2025 at 8:46 PM Liam R. Howlett <Liam.Howlett@...cle.com> wrote:
> >
> > * Lorenzo Stoakes <lorenzo.stoakes@...cle.com> [250213 07:16]:
> > > On Thu, Feb 13, 2025 at 01:03:04PM +0100, Miguel Ojeda wrote:
> > > > On Thu, Feb 13, 2025 at 12:50 PM Lorenzo Stoakes
> > > > <lorenzo.stoakes@...cle.com> wrote:
> > > > >
> > > > > Right, I don't mean the rust subsystem, I mean designated rust
> > > > > maintainers. The point being that this won't add workload to Andrew, nor
> > > > > require him nor other mm C people to understand rust.
> > > >
> > > > Sounds good, and apologies for being pedantic, but given the recent
> > > > discussions, I thought I should clarify just in case others read it
> > > > differently.
> > > >
> > > > In the same vein, one more quick thing (that you probably didn't mean
> > > > in this way, but still, I think it is better I add the note, sorry): I
> > > > don't think it is true that it will not add workload to Andrew or MM
> > > > in general. It always adds some workload, even if the maintainers
> > > > don't handle the patches at all, since they may still need to perform
> > > > a small change in something Rust related due to another change they
> > > > need to do, or perhaps at least contact the Rust sub-maintainer to do
> > > > it for them, etc.
> > > >
> > > >     https://rust-for-linux.com/rust-kernel-policy#didnt-you-promise-rust-wouldnt-be-extra-work-for-maintainers
> > > >
> > > > Cheers,
> > > > Miguel
> > >
> > > Ack, for the record I'm happy to help with any work that might come up.
> >
> > Ack, here too.
> >
> > Without the drama, I'm not sure how we'd feel so alive :P
> >
> > Can I be added to whatever list so I can be Cc'ed on the changes on your
> > side?
>
> I'm happy to format the entries whichever way you all prefer, but for
> example it could be a new MAINTAINERS entry below MEMORY MAPPING along
> these lines:
>
> MEMORY MANAGEMENT/MAPPING [RUST]

I think a general:

MEMORY MANAGEMENT [RUST]

works better here as it ought to (at least for the time being) cover off all
rust mm stuff.

> M: Alice Ryhl <aliceryhl@...gle.com>

I wonder if we should have Andrew as a co-maintainer here so people also
send to Andrew also for merge? (and obviously as the mm maintainer he may
have commentary).

> R: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>

Am happy to be a reviewer this is fine!

> R: Liam R. Howlett <Liam.Howlett@...cle.com>

I am sure Liam is also, but of course he can comment himself :)

> L: linux-mm@...ck.org
> L: rust-for-linux@...r.kernel.org
> S: Maintained

Probably need these here too if Andrew is taking in his tree:

W:	http://www.linux-mm.org
T:	git git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

> F: rust/helpers/mm.c
> F: rust/kernel/mm.rs
> F: rust/kernel/mm/
>
> Alice

But in general with tweaks I am happy for this to be added to MAINTAINERS
_personally_, am I but a minor figure however, it is up to Andrew
ultimately :)