Re: [PATCH 0/4] Workqueue: replace system wq and change alloc_workqueue callers

[Marco Crivellari]

On Thu, Aug 21, 2025 at 1:19 AM Tejun Heo <tj@xxxxxxxxxx> wrote:
>
> Hello,
>
> On Tue, Aug 19, 2025 at 02:28:12PM +0200, Marco Crivellari wrote:
> > Sorry for another email.
> >
> > Another question / observation: I guess maintainers can't just pull
> > the changes and merge for the next release, if the workqueue changes
> > (e.g. changes in queue_work() etc) are not also merged, right?
> >
> > I received a reply here, in the meantime, in "Workqueue: fs: replace
> > use of system_wq and add WQ_PERCPU to alloc_workqueue users"
> > (https://www.spinics.net/lists/kernel/msg5811817.html).
>
> I can prepare a branch that fs can pull but aren't all the prerequisites
> already in the master branch from the last cycle?
>
> Thanks.
>
> --
> tejun

Hello Tejun,

There is still the logic inside "include/linux/workqueue.h", in
queue_delayed_work() / mod_delayed_work() / queue_work().
Just the pr_warn_once() and the workqueue redirection.

These changes are introduced by 2 different patches, based on when the
two new wq(s) are replaced inside the code.

There are also changes inside  __alloc_workqueue(), always in this
series (when WQ_PERCPU is used), because they are the "general" (core)
changes.

If I remember correctly we decided to keep the prerequisites without
any more "logic".
As long as this series is merged before or anyhow in the same rc, I
think there are no problems; right?

Thank you!

-- 

Marco Crivellari

L3 Support Engineer, Technology & Product




marco.crivellari@xxxxxxxx