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Sender: Tejun Heo <htejun@gmail.com>
Date:   Wed, 17 May 2023 11:48:19 -1000
From:   Tejun Heo <tj@kernel.org>
To:     Alice Ryhl <aliceryhl@google.com>
Cc:     rust-for-linux@vger.kernel.org, Miguel Ojeda <ojeda@kernel.org>,
        Wedson Almeida Filho <wedsonaf@gmail.com>,
        Lai Jiangshan <jiangshanlai@gmail.com>,
        Alex Gaynor <alex.gaynor@gmail.com>,
        Boqun Feng <boqun.feng@gmail.com>, Gary Guo <gary@garyguo.net>,
        =?iso-8859-1?Q?Bj=F6rn?= Roy Baron <bjorn3_gh@protonmail.com>,
        Benno Lossin <benno.lossin@proton.me>,
        linux-kernel@vger.kernel.org, patches@lists.linux.dev
Subject: Re: [PATCH v1 0/7] Bindings for the workqueue
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Hello, Alice.

On Wed, May 17, 2023 at 08:31:12PM +0000, Alice Ryhl wrote:
> This patchset contains bindings for the kernel workqueue.
> 
> One of the primary goals behind the design used in this patch is that we
> must support embedding the `work_struct` as a field in user-provided
> types, because this allows you to submit things to the workqueue without
> having to allocate, making the submission infallible. If we didn't have
> to support this, then the patch would be much simpler. One of the main
> things that make it complicated is that we must ensure that the function
> pointer in the `work_struct` is compatible with the struct it is
> contained within.
> 
> This patch could be significantly simplified if we already had the field
> projection bindings. However, we have decided to upstream the current
> version that does not depend on field projection first - the PR that
> introduces field projections will then include a commit that simplifies
> the workqueue implementation. (In particular, it would simplify the 5th
> patch in this series.)
> 
> The first version of the workqueue bindings was written by Wedson, but
> I have rewritten much of it so that it uses the pin-init infrastructure
> and can be used with containers other than `Arc`.

I tried to read the patches but am too dumb to understand much. Any chance
you can provide some examples so that I can at least imagine how workqueue
would be used from rust side?

Thanks.

-- 
tejun