Re: Rust kernel policy

Dave Airlie
2025-02-21T07:05:09Z

On Fri, 21 Feb 2025 at 15:59, Felipe Contreras
<felipe.contreras@gmail.com> wrote:
>
> Boqun Feng wrote:
> >
> > On Thu, Feb 20, 2025 at 11:19:09PM -0600, Felipe Contreras wrote:
> > > Greg KH wrote:
> > > > But for new code / drivers, writing them in rust where these types of
> > > > bugs just can't happen (or happen much much less) is a win for all of
> > > > us, why wouldn't we do this?
> > >
> > > *If* they can be written in Rust in the first place. You are skipping that
> > > very important precondition.
> >
> > Hmm.. there are multiple old/new drivers (not a complete list) already
> > in Rust:
>
> That is a black swan fallacy. Just because you've seen 4 white swans
> that doesn't mean all swans are white.
>
> > , so is there still a question that drivers can be written in Rust?
>
> I didn't say no driver can be written Rust, I questioned whether *all*
> drivers can be written in Rust.
>
> People are operating under that assumption, but it isn't necessarily true.

That doesn't make sense, like you could make a statement that not all
drivers could be written in C, but it would be trash, so why do you
think rust is different?

if you said 100% safe rust I'd agree, but that isn't the goal.

Dave.