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From: Tejun Heo <tj@kernel.org>
To: Marco Crivellari <marco.crivellari@suse.com>
Cc: linux-kernel@vger.kernel.org,
	Lai Jiangshan <jiangshanlai@gmail.com>,
	Frederic Weisbecker <frederic@kernel.org>,
	Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
	Michal Hocko <mhocko@suse.com>, Breno Leitao <leitao@debian.org>
Subject: Re: [PATCH v2 1/2] workqueue: Make alloc_workqueue() unbound by default
Date: Thu, 03 Sep 2026 08:42:41 -1000	[thread overview]
Message-ID: <c02681b23c71737d9a84dea194b24691@kernel.org> (raw)
In-Reply-To: <20260903165251.481362-2-marco.crivellari@suse.com>

Hello, Marco.

On Thu, Sep 03, 2026 at 06:52:50PM +0200, Marco Crivellari wrote:
> +	if (unlikely(!(flags & (WQ_UNBOUND | WQ_PERCPU)))) {
> +		flags |= WQ_UNBOUND;
> +		wq_unbound_by_default = true;

WQ_BH without WQ_PERCPU passes the __WQ_BH_ALLOWS check above and then gets
WQ_UNBOUND here, putting a BH workqueue on an unbound pool. WQ_BH should
imply WQ_PERCPU.

Thanks.

-- 
tejun

  reply	other threads:[~2026-09-03 18:42 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-03 16:52 [PATCH v2 0/2] workqueue: Make WQ_UNBOUND the default behavior Marco Crivellari
2026-09-03 16:52 ` [PATCH v2 1/2] workqueue: Make alloc_workqueue() unbound by default Marco Crivellari
2026-09-03 18:42   ` Tejun Heo [this message]
2026-09-04  8:24     ` Marco Crivellari
2026-09-03 16:52 ` [PATCH v2 2/2] doc: Update WQ_UNBOUND documentation Marco Crivellari

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