linux-kernel - Re: Linux kernel in-tree Rust support

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Message-ID: <20200712123151.GB25970@localhost>
Date:   Sun, 12 Jul 2020 15:31:51 +0300
From:   Adrian Bunk <bunk@...nel.org>
To:     Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     alex.gaynor@...il.com, geofft@...reload.com, jbaublitz@...hat.com,
        Masahiro Yamada <masahiroy@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Greg KH <gregkh@...uxfoundation.org>,
        Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
        Josh Triplett <josh@...htriplett.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        LKML <linux-kernel@...r.kernel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>
Subject: Re: Linux kernel in-tree Rust support

On Thu, Jul 09, 2020 at 11:41:47AM -0700, Nick Desaulniers wrote:
>...
> but also a larger question of "should we do
> this?" or "how might we place limits on where this can be used?"
>...

I won't attend, but I do have a topic that should be covered:

Firefox always depends on recent Rust, which forces distributions to 
update Rust in stable releases.

As an example:
Ubuntu LTS releases upgrade to a new Rust version every 1-2 months.
Ubuntu 16.04 started with Rust 1.7.0 and is now at Rust 1.41.0.

It would not sound good to me if security updates of distribution
kernels might additionally end up using a different version of the
Rust compiler - the toolchain for the kernel should be stable.

Would Rust usage in the kernel require distributions to ship
a "Rust for Firefox" and a "Rust for the kernel"?

> Thanks,
> ~Nick Desaulniers

cu
Adrian