linux-kernel - Re: [PATCH 0/6] rust: page: Support borrowing `struct page` and physaddr conversion

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Message-ID: <a3551d7d-14c7-40a0-90ff-1fcce93be62a@asahilina.net>
Date: Mon, 3 Feb 2025 23:41:41 +0900
From: Asahi Lina <lina@...hilina.net>
To: Danilo Krummrich <dakr@...nel.org>
Cc: Miguel Ojeda <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...il.com>,
 Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
 Björn Roy Baron <bjorn3_gh@...tonmail.com>,
 Benno Lossin <benno.lossin@...ton.me>,
 Andreas Hindborg <a.hindborg@...nel.org>, Alice Ryhl <aliceryhl@...gle.com>,
 Trevor Gross <tmgross@...ch.edu>, Jann Horn <jannh@...gle.com>,
 Matthew Wilcox <willy@...radead.org>, Paolo Bonzini <pbonzini@...hat.com>,
 Wedson Almeida Filho <wedsonaf@...il.com>,
 Valentin Obst <kernel@...entinobst.de>,
 Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
 airlied@...hat.com, Abdiel Janulgue <abdiel.janulgue@...il.com>,
 rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org,
 asahi@...ts.linux.dev
Subject: Re: [PATCH 0/6] rust: page: Support borrowing `struct page` and
 physaddr conversion



On 2/3/25 7:22 PM, Danilo Krummrich wrote:
> Hi Lina,
> 
> On Sun, Feb 02, 2025 at 10:05:42PM +0900, Asahi Lina wrote:
>> This series refactors the existing Page wrapper to support borrowing
>> `struct page` objects without ownership on the Rust side, and converting
>> page references to/from physical memory addresses.
> 
> Thanks for picking this up!
> 
> As you know, this has been previously worked on by Abdiel. Kindly drop a note
> if you intend to pick up something up next time, such that we don't end up doing
> duplicated work.

Sorry! I wasn't sure if this was going to end up submitted over the
holidays so I wasn't in a rush, but I ended up switching gears in the
past couple of weeks and I really needed this feature now (for crashdump
support to debug a really annoying firmware crash).

I actually only just noticed that the previous v2 already had
Owned/Ownable... I only saw the v3 which didn't, so I didn't realize
there was already a version of that approach in the past.

~~ Lina