Re: C aggregate passing (Rust kernel policy)

[Ralf Jung]

On 26.02.25 15:26, James Bottomley wrote:
> On Wed, 2025-02-26 at 14:53 +0100, Miguel Ojeda wrote:
> > On Wed, Feb 26, 2025 at 2:03 PM Ventura Jack
> > <venturajack85@xxxxxxxxx> wrote:
> [...]
> > > Exception/unwind safety may be another subject that increases
> > > the difficulty of writing unsafe Rust.
> >
> > Note that Rust panics in the kernel do not unwind.
>
> I presume someone is working on this, right?  While rust isn't
> pervasive enough yet for this to cause a problem, dumping a backtrace
> is one of the key things we need to diagnose how something went wrong,
> particularly for user bug reports where they can't seem to bisect.

Rust panics typically print a backtrace even if they don't unwind. This works 
just fine in userland, but I don't know the state in the kernel.

Kind regards,
Ralf