linux-kernel - Re: [PATCH 00/13] [RFC] Rust support

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Date:   Fri, 16 Apr 2021 13:48:42 -0700
From:   Josh Triplett <josh@...htriplett.org>
To:     Boqun Feng <boqun.feng@...il.com>
Cc:     Peter Zijlstra <peterz@...radead.org>, ojeda@...nel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        rust-for-linux@...r.kernel.org, linux-kbuild@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Alan Stern <stern@...land.harvard.edu>,
        Andrea Parri <parri.andrea@...il.com>,
        Will Deacon <will@...nel.org>,
        Nicholas Piggin <npiggin@...il.com>,
        David Howells <dhowells@...hat.com>,
        Jade Alglave <j.alglave@....ac.uk>,
        Luc Maranget <luc.maranget@...ia.fr>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Akira Yokosawa <akiyks@...il.com>,
        Daniel Lustig <dlustig@...dia.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Wedson Almeida Filho <wedsonaf@...gle.com>
Subject: Re: [PATCH 00/13] [RFC] Rust support

On Fri, Apr 16, 2021 at 12:27:39PM +0800, Boqun Feng wrote:
> Josh, I think it's good if we can connect to the people working on Rust
> memoryg model, I think the right person is Ralf Jung and the right place
> is https://github.com/rust-lang/unsafe-code-guidelines, but you
> cerntainly know better than me ;-) Or maybe we can use Rust-for-Linux or
> linux-toolchains list to discuss.

Ralf is definitely the right person to talk to. I don't think the UCG
repository is the right place to start that discussion, though. For now,
I'd suggest starting an email thread with Ralf and some C-and-kernel
memory model folks (hi Paul!) to suss out the most important changes
that would be needed.

With my language team hat on, I'd *absolutely* like to see the Rust
memory model support RCU-style deferred reclamation in a sound way,
ideally with as little unsafe code as possible.