From: Mathias Nyman <mathias.nyman@linux.intel.com>
To: Marco Crivellari <marco.crivellari@suse.com>,
linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org
Cc: Tejun Heo <tj@kernel.org>, Lai Jiangshan <jiangshanlai@gmail.com>,
Frederic Weisbecker <frederic@kernel.org>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Michal Hocko <mhocko@suse.com>,
Mathias Nyman <mathias.nyman@intel.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: Re: [PATCH] usb: xhci: replace use of system_wq with system_percpu_wq
Date: Wed, 12 Nov 2025 14:00:10 +0200 [thread overview]
Message-ID: <2a80955c-2e89-4175-9688-6ca29538dd33@linux.intel.com> (raw)
In-Reply-To: <20251106145428.250251-1-marco.crivellari@suse.com>
On 11/6/25 16:54, Marco Crivellari wrote:
> Currently if a user enqueues a work item using schedule_delayed_work() the
> used wq is "system_wq" (per-cpu wq) while queue_delayed_work() use
> WORK_CPU_UNBOUND (used when a cpu is not specified). The same applies to
> schedule_work() that is using system_wq and queue_work(), that makes use
> again of WORK_CPU_UNBOUND.
>
> This lack of consistency cannot be addressed without refactoring the API.
>
> This continues the effort to refactor workqueue APIs, which began with
> the introduction of new workqueues and a new alloc_workqueue flag in:
>
> commit 128ea9f6ccfb ("workqueue: Add system_percpu_wq and system_dfl_wq")
> commit 930c2ea566af ("workqueue: Add new WQ_PERCPU flag")
>
> Switch to using system_percpu_wq because system_wq is going away as part of
> a workqueue restructuring.
>
> Suggested-by: Tejun Heo <tj@kernel.org>
> Signed-off-by: Marco Crivellari <marco.crivellari@suse.com>
> ---
Thanks, added to queue
-Mathias
next prev parent reply other threads:[~2025-11-12 12:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-06 14:54 Marco Crivellari
2025-11-12 12:00 ` Mathias Nyman [this message]
2025-11-12 12:03 ` Marco Crivellari
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