linux-kernel - Re: [PATCH 2/2 wq/for-6.9] async: Use a dedicated unbound workqueue with raised min

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Message-ID: <ZcaVMRl2IK8vMpVh@slm.duckdns.org>
Date: Fri, 9 Feb 2024 11:12:17 -1000
From: Tejun Heo <tj@...nel.org>
To: Marek Szyprowski <m.szyprowski@...sung.com>
Cc: "Rafael J. Wysocki" <rjw@...ysocki.net>, linux-kernel@...r.kernel.org,
	Lai Jiangshan <jiangshanlai@...il.com>
Subject: Re: [PATCH 2/2 wq/for-6.9] async: Use a dedicated unbound workqueue
 with raised min_active

On Thu, Feb 08, 2024 at 02:14:16PM -1000, Tejun Heo wrote:
> Async can schedule a number of interdependent work items. However, since
> 5797b1c18919 ("workqueue: Implement system-wide nr_active enforcement for
> unbound workqueues"), unbound workqueues have separate min_active which sets
> the number of interdependent work items that can be handled. This default
> value is 8 which isn't sufficient for async and can lead to stalls during
> resume from suspend in some cases.
> 
> Let's use a dedicated unbound workqueue with raised min_active.
> 
> Signed-off-by: Tejun Heo <tj@...nel.org>
> Link: http://lkml.kernel.org/r/708a65cc-79ec-44a6-8454-a93d0f3114c3@samsung.com
> Reported-by: Marek Szyprowski <m.szyprowski@...sung.com>
> Cc: Rafael J. Wysocki <rjw@...ysocki.net>

Applying to wq/for-6.9. Rafael, if you have any objections, please holler.

Thanks.

-- 
tejun