linux-kernel - Re: [PATCH v5 04/26] rust: alloc: implement `Allocator` for `Kmalloc`

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Message-ID: <Zrzh2g1AgDm9rfo8@cassiopeiae>
Date: Wed, 14 Aug 2024 18:56:58 +0200
From: Danilo Krummrich <dakr@...nel.org>
To: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
Cc: Alice Ryhl <aliceryhl@...gle.com>, ojeda@...nel.org,
	alex.gaynor@...il.com, wedsonaf@...il.com, boqun.feng@...il.com,
	gary@...yguo.net, bjorn3_gh@...tonmail.com, benno.lossin@...ton.me,
	a.hindborg@...sung.com, akpm@...ux-foundation.org,
	daniel.almeida@...labora.com, faith.ekstrand@...labora.com,
	boris.brezillon@...labora.com, lina@...hilina.net,
	mcanal@...lia.com, zhiw@...dia.com, cjia@...dia.com,
	jhubbard@...dia.com, airlied@...hat.com, ajanulgu@...hat.com,
	lyude@...hat.com, linux-kernel@...r.kernel.org,
	rust-for-linux@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH v5 04/26] rust: alloc: implement `Allocator` for `Kmalloc`

On Wed, Aug 14, 2024 at 06:16:34PM +0200, Miguel Ojeda wrote:
> On Wed, Aug 14, 2024 at 6:02 PM Miguel Ojeda
> <miguel.ojeda.sandonis@...il.com> wrote:
> >
> > I checked about `__must_check`, because it would be nice if it is used
> > by `bindgen`, and it turns out it already does, but behind
> > `--enable-function-attribute-detection` (apparently for performance
> > reasons):
> 
> I just tried, and the flag seems to work, gives us a bunch of
> `#[must_use]`s which are nice, and apparently no other change (in
> usual x86_64 config at least).

Cool! That's even better then.

> 
> I don't notice any significant performance difference in our case, so
> I will send a quick patch to see if others find an issue with it.
> 
> Cheers,
> Miguel
>