linux-kernel - Re: [PATCH v2 1/2] rust: workqueue: restrict delayed work to global wqs

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Message-ID: <CAH5fLgixPsBwqFdY-ku3AtGQHY+qa9m5oqMUshqdob7nzGQpag@mail.gmail.com>
Date: Thu, 13 Nov 2025 11:08:38 +0100
From: Alice Ryhl <aliceryhl@...gle.com>
To: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
Cc: Tejun Heo <tj@...nel.org>, Miguel Ojeda <ojeda@...nel.org>, 
	Lai Jiangshan <jiangshanlai@...il.com>, Boqun Feng <boqun.feng@...il.com>, 
	Gary Guo <gary@...yguo.net>, Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
	Andreas Hindborg <a.hindborg@...nel.org>, Trevor Gross <tmgross@...ch.edu>, 
	Danilo Krummrich <dakr@...nel.org>, Daniel Almeida <daniel.almeida@...labora.com>, 
	John Hubbard <jhubbard@...dia.com>, Philipp Stanner <phasta@...nel.org>, 
	Tamir Duberstein <tamird@...il.com>, rust-for-linux@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Benno Lossin <lossin@...nel.org>
Subject: Re: [PATCH v2 1/2] rust: workqueue: restrict delayed work to global wqs

On Thu, Nov 13, 2025 at 11:06 AM Miguel Ojeda
<miguel.ojeda.sandonis@...il.com> wrote:
>
> On Thu, Nov 13, 2025 at 11:01 AM Alice Ryhl <aliceryhl@...gle.com> wrote:
> >
> > When a workqueue is shut down, delayed work that is pending but not
> > scheduled does not get properly cleaned up, so it's not safe to use
> > `enqueue_delayed` on a workqueue that might be destroyed. To fix this,
> > restricted `enqueue_delayed` to static queues.
>
> Should this have a Fixes and Cc: stable?

I could go either way. Without the next patch, there's no way to use a
non-global workqueue. But probably is useful to backport anyway and
there's certainly no harm.

Alice