linux-kernel - Re: [PATCH 3/4] amd/amdkfd: WQ_PERCPU added to alloc

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Message-ID: <CAAofZF4V7gN=AqgLwcva+zhJyROYfSjzJ2uLxoNeS2KLuytW9Q@mail.gmail.com>
Date: Fri, 31 Oct 2025 09:48:49 +0100
From: Marco Crivellari <marco.crivellari@...e.com>
To: Christian König <christian.koenig@....com>
Cc: linux-kernel@...r.kernel.org, amd-gfx@...ts.freedesktop.org, 
	dri-devel@...ts.freedesktop.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>, 
	Alex Deucher <alexander.deucher@....com>, David Airlie <airlied@...il.com>, 
	Simona Vetter <simona@...ll.ch>, "Yang, Philip" <Philip.Yang@....com>, 
	"Kuehling, Felix" <Felix.Kuehling@....com>
Subject: Re: [PATCH 3/4] amd/amdkfd: WQ_PERCPU added to alloc_workqueue users

On Thu, Oct 30, 2025 at 6:15 PM Christian König
<christian.koenig@....com> wrote:
>[...]
> Adding Philip and Felix to comment, but this should most likely also not execute on the same CPU as the one who scheduled the work.

Hi Christian,

The actual behavior without WQ_PERCPU is exactly the same: with 0 it
means the workqueue is per-cpu. We just enforced that, adding the
WQ_PERCPU flag, so that it is explicit.

So if you need this to be unbound, I can send the v2 with WQ_UNBOUND
instead of WQ_PERCPU.

Thanks!

--

Marco Crivellari

L3 Support Engineer, Technology & Product