Re: [PATCH 07/13] Rust: Kernel crate

[Miguel Ojeda]

On Wed, Apr 14, 2021 at 9:31 PM Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> Again, excuse my lack of internal Rust knowledge, but when do these
> end up being an issue?
>
> If the Rust compiler ends up doing hidden allocations, and they then
> cause panics, then one of the main *points* of Rustification is
> entirely broken. That's 100% the opposite of being memory-safe at
> build time.

Of course! What happens here is that we use, for the moment, `alloc`,
which is part of the Rust standard library. However, we will be
customizing/rewriting `alloc` as needed to customize its types (things
like `Box`, `Vec`, etc.) so that we can do things like pass allocation
flags, ensure we always have fallible allocations, perhaps reuse some
of the kernel data structures, etc.

Cheers,
Miguel