Re: [PATCH v3 1/2] rust: workqueue: restrict delayed work to global wqs

[Alice Ryhl]

On Fri, Feb 27, 2026 at 07:09:07AM -1000, Tejun Heo wrote:
> On Fri, Feb 27, 2026 at 02:53:20PM +0000, Alice Ryhl 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.
> 
> C being C, we've been just chalking this up as "user error", but please feel
> free to add per-workqueue percpu ref for pending delayed work items if
> that'd help. That shouldn't be noticeably expensive and should help
> straighten this out for rust hopefully.

I had been thinking I would pick up this patch again:
https://lore.kernel.org/all/20250423-destroy-workqueue-flush-v1-1-3d74820780a5@xxxxxxxxxx/

but it sounds like you're suggesting a different solution?

Alice