From: "Benno Lossin" <lossin@kernel.org>
To: "Matthew Maurer" <mmaurer@google.com>
Cc: "Danilo Krummrich" <dakr@kernel.org>,
"Miguel Ojeda" <ojeda@kernel.org>,
"Alex Gaynor" <alex.gaynor@gmail.com>,
"Boqun Feng" <boqun.feng@gmail.com>,
"Gary Guo" <gary@garyguo.net>,
"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
"Benno Lossin" <benno.lossin@proton.me>,
"Andreas Hindborg" <a.hindborg@kernel.org>,
"Alice Ryhl" <aliceryhl@google.com>,
"Trevor Gross" <tmgross@umich.edu>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
"Sami Tolvanen" <samitolvanen@google.com>,
"Timur Tabi" <ttabi@nvidia.com>,
linux-kernel@vger.kernel.org, rust-for-linux@vger.kernel.org
Subject: Re: [PATCH v5 4/4] rust: samples: Add debugfs sample
Date: Thu, 15 May 2025 10:50:43 +0200 [thread overview]
Message-ID: <D9WLTFASYNN8.CDM0HJKG6RR9@kernel.org> (raw)
In-Reply-To: <CAGSQo00Pj0qF90712K7xACNEvr2e0q=98b8-0VUcXLD5V+oDhg@mail.gmail.com>
On Thu May 15, 2025 at 12:08 AM CEST, Matthew Maurer wrote:
> Yes, this is also an issue when it comes to attaching data to debugfs
> if you look at the WIP patchset [1]. If we do end up deciding to try
> to do self-referential structs for users (I'd rather not, but I
> understand I don't have the deciding vote here), I'd strongly suggest
> considering self_cell [2] as a model instead of ouroboros - there are
> structural UB issues [3] with ouroboros that are unlikely to be
> resolved, and the author of ouroboros encourages use of self_cell
> instead [4]
I do not think we should add something that allows us to have
self-referential structs. I only mentioned ouroboros, because in theory
it's possible to do in Rust, but we shouldn't do it.
---
Cheers,
Benno
> [1]: https://lore.kernel.org/all/20250506-debugfs-rust-attach-v2-0-c6f88be3890a@google.com/
> [2]: https://docs.rs/self_cell/latest/self_cell/
> [3]: https://github.com/rust-lang/miri/issues/2844#issuecomment-1510577943
> [4]: https://github.com/someguynamedjosh/ouroboros/issues/88
next prev parent reply other threads:[~2025-05-15 8:50 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-05 23:51 [PATCH v5 0/4] rust: DebugFS Bindings Matthew Maurer
2025-05-05 23:51 ` [PATCH v5 1/4] rust: debugfs: Bind DebugFS directory creation Matthew Maurer
2025-05-07 18:46 ` Timur Tabi
2025-05-14 22:26 ` Matthew Maurer
2025-05-14 7:33 ` Benno Lossin
2025-05-14 8:49 ` Greg Kroah-Hartman
2025-05-14 9:38 ` Benno Lossin
2025-05-05 23:51 ` [PATCH v5 2/4] rust: debugfs: Bind file creation for long-lived Display Matthew Maurer
2025-05-07 19:04 ` Timur Tabi
2025-05-07 19:41 ` Timur Tabi
2025-05-09 12:56 ` Alice Ryhl
2025-05-12 20:51 ` Timur Tabi
2025-05-14 8:06 ` Benno Lossin
2025-05-05 23:51 ` [PATCH v5 3/4] rust: debugfs: Support format hooks Matthew Maurer
2025-05-05 23:51 ` [PATCH v5 4/4] rust: samples: Add debugfs sample Matthew Maurer
2025-05-14 7:20 ` Benno Lossin
2025-05-14 9:07 ` Danilo Krummrich
2025-05-14 9:54 ` Benno Lossin
2025-05-14 11:24 ` Danilo Krummrich
2025-05-14 12:21 ` Benno Lossin
2025-05-14 13:04 ` Danilo Krummrich
2025-05-14 22:14 ` Matthew Maurer
2025-05-14 22:08 ` Matthew Maurer
2025-05-14 22:14 ` Danilo Krummrich
2025-05-14 22:23 ` Matthew Maurer
2025-05-14 22:32 ` Matthew Maurer
2025-05-14 22:40 ` Timur Tabi
2025-05-14 22:42 ` Matthew Maurer
2025-05-15 7:43 ` gregkh
2025-05-15 8:50 ` Benno Lossin [this message]
2025-05-14 21:55 ` Matthew Maurer
2025-05-14 22:18 ` Danilo Krummrich
2025-05-15 8:59 ` Benno Lossin
2025-05-15 11:43 ` Greg Kroah-Hartman
2025-05-15 12:37 ` Danilo Krummrich
2025-05-15 12:55 ` Benno Lossin
2025-05-20 21:24 ` Alice Ryhl
2025-05-21 4:47 ` Greg Kroah-Hartman
2025-05-21 22:40 ` Alice Ryhl
2025-05-21 7:57 ` Danilo Krummrich
2025-05-21 22:43 ` Alice Ryhl
2025-05-22 6:25 ` Danilo Krummrich
2025-05-22 8:28 ` Greg Kroah-Hartman
2025-05-22 14:01 ` Alice Ryhl
2025-05-22 14:15 ` Greg Kroah-Hartman
2025-05-22 17:40 ` Alice Ryhl
2025-05-22 20:26 ` Benno Lossin
2025-05-23 9:15 ` Greg Kroah-Hartman
2025-05-22 17:53 ` Danilo Krummrich
2025-05-23 9:14 ` Greg Kroah-Hartman
2025-05-23 9:42 ` Danilo Krummrich
2025-05-23 10:22 ` Greg Kroah-Hartman
2025-05-23 17:09 ` Alice Ryhl
2025-05-24 12:25 ` Danilo Krummrich
2025-05-27 11:38 ` Alice Ryhl
2025-05-27 11:50 ` Danilo Krummrich
2025-06-10 17:54 ` Matthew Maurer
2025-05-23 17:06 ` Alice Ryhl
2025-05-07 16:49 ` [PATCH v5 0/4] rust: DebugFS Bindings Danilo Krummrich
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=D9WLTFASYNN8.CDM0HJKG6RR9@kernel.org \
--to=lossin@kernel.org \
--cc=a.hindborg@kernel.org \
--cc=alex.gaynor@gmail.com \
--cc=aliceryhl@google.com \
--cc=benno.lossin@proton.me \
--cc=bjorn3_gh@protonmail.com \
--cc=boqun.feng@gmail.com \
--cc=dakr@kernel.org \
--cc=gary@garyguo.net \
--cc=gregkh@linuxfoundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mmaurer@google.com \
--cc=ojeda@kernel.org \
--cc=rafael@kernel.org \
--cc=rust-for-linux@vger.kernel.org \
--cc=samitolvanen@google.com \
--cc=tmgross@umich.edu \
--cc=ttabi@nvidia.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.