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Date: Tue, 02 Jun 2026 15:48:21 +0200
Message-Id: <DIYLZYLC90KZ.4RUH3GPWPA1J@kernel.org>
Subject: Re: [PATCH] driver core: Use system_percpu_wq instead of system_wq
Cc: "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>, "Rafael J. Wysocki"
 <rafael@kernel.org>, "Zhang Yuwei" <zhangyuwei20@huawei.com>, "Marco
 Crivellari" <marco.crivellari@suse.com>, "Tejun Heo" <tj@kernel.org>,
 <driver-core@lists.linux.dev>, <linux-kernel@vger.kernel.org>
To: "Nathan Chancellor" <nathan@kernel.org>
From: "Danilo Krummrich" <dakr@kernel.org>
References: <20260601-driver-core-fix-system_wq-warning-v1-1-f9001a70ee25@kernel.org>
In-Reply-To: <20260601-driver-core-fix-system_wq-warning-v1-1-f9001a70ee25@kernel.org>

On Tue Jun 2, 2026 at 5:56 AM CEST, Nathan Chancellor wrote:
> diff --git a/drivers/base/dd.c b/drivers/base/dd.c
> index a8ca2092905e..60c005223844 100644
> --- a/drivers/base/dd.c
> +++ b/drivers/base/dd.c
> @@ -324,7 +324,7 @@ void deferred_probe_extend_timeout(void)
>  	 * start a new one.
>  	 */
>  	if (delayed_work_pending(&deferred_probe_timeout_work) &&
> -	    mod_delayed_work(system_wq, &deferred_probe_timeout_work,
> +	    mod_delayed_work(system_percpu_wq, &deferred_probe_timeout_work,

Thanks for catching this!

I think this does not actually require per-CPU affinity, but that's indepen=
dent
of this patch of course.

Thanks,
Danilo