linux-kernel - Re: [PATCH] RAS/CEC: replace use of system_wq with system_percpu

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Message-ID: <CAAofZF4fBbFtiKxde2M2ikK4k-LqYVRoavPbNVh-XFiQPmfGvw@mail.gmail.com>
Date: Wed, 5 Nov 2025 17:55:49 +0100
From: Marco Crivellari <marco.crivellari@...e.com>
To: Borislav Petkov <bp@...en8.de>
Cc: linux-kernel@...r.kernel.org, linux-edac@...r.kernel.org, 
	Tejun Heo <tj@...nel.org>, Lai Jiangshan <jiangshanlai@...il.com>, 
	Frederic Weisbecker <frederic@...nel.org>, Sebastian Andrzej Siewior <bigeasy@...utronix.de>, 
	Michal Hocko <mhocko@...e.com>, Tony Luck <tony.luck@...el.com>
Subject: Re: [PATCH] RAS/CEC: replace use of system_wq with system_percpu_wq

Hi,

Many thanks for all the information. I've already changed the commit
log for the v2.

> > with the change introducing new workqueues and a new alloc_workqueue flag:
> >
> > commit 128ea9f6ccfb ("workqueue: Add system_percpu_wq and system_dfl_wq")
> > commit 930c2ea566af ("workqueue: Add new WQ_PERCPU flag")
> >
> > Replace system_wq with system_percpu_wq, keeping the old behavior.
>
> What is the new behavior?
>
> Should this driver be converted to it?

The code is using system_wq, this is the per-cpu workqueue. This
change will only
replace system_wq with system_percpu_wq. So the behavior is the same as before.

Thanks!

-- 

Marco Crivellari

L3 Support Engineer, Technology & Product