linux-kernel - Re: [PATCH v2] smp: replace use of system_wq with system_percpu

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Message-ID: <CAAofZF6zVoh2Fa+gggTd7+08GZz2j=Jkm52tkiGW5xQEEKWD8A@mail.gmail.com>
Date: Wed, 24 Dec 2025 16:19:20 +0100
From: Marco Crivellari <marco.crivellari@...e.com>
To: linux-kernel@...r.kernel.org
Cc: 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>, Ingo Molnar <mingo@...hat.com>, Rik van Riel <riel@...riel.com>, 
	"Paul E . McKenney" <paulmck@...nel.org>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Subject: Re: [PATCH v2] smp: replace use of system_wq with system_percpu_wq

On Mon, Nov 10, 2025 at 6:03 PM Marco Crivellari
<marco.crivellari@...e.com> wrote:
> [...]
>  kernel/smp.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/kernel/smp.c b/kernel/smp.c
> index 02f52291fae4..496358eae37c 100644
> --- a/kernel/smp.c
> +++ b/kernel/smp.c
> @@ -1137,7 +1137,7 @@ int smp_call_on_cpu(unsigned int cpu, int (*func)(void *), void *par, bool phys)
>         if (cpu >= nr_cpu_ids || !cpu_online(cpu))
>                 return -ENXIO;
>
> -       queue_work_on(cpu, system_wq, &sscs.work);
> +       queue_work_on(cpu, system_percpu_wq, &sscs.work);
>         wait_for_completion(&sscs.done);
>         destroy_work_on_stack(&sscs.work);
>

Gentle ping.

Thanks!

-- 

Marco Crivellari

L3 Support Engineer