linux-kernel - RE: [PATCH v2] workqueue: add cmdline parameter workqueue.panic_on

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Message-Id: <20240807014756.3948130-1-sangmoon.kim@samsung.com>
Date: Wed,  7 Aug 2024 10:47:56 +0900
From: Sangmoon Kim <sangmoon.kim@...sung.com>
To: Tejun Heo <tj@...nel.org>
Cc: jiangshanlai@...il.com, jordan.lim@...sung.com,
	linux-kernel@...r.kernel.org, myoungjae.kim@...sung.com,
	sangmoon.kim@...sung.com, youngjae24.lim@...sung.com
Subject: RE: [PATCH v2] workqueue: add cmdline parameter
 workqueue.panic_on_stall


> -----Original Message-----
> From: Tejun Heo <htejun@...il.com> On Behalf Of Tejun Heo
> Sent: Wednesday, August 7, 2024 5:08 AM
> 
> On Tue, Aug 06, 2024 at 02:12:09PM +0900, Sangmoon Kim wrote:
> > When we want to debug the workqueue stall, we can immediately make
> > a panic to get the information we want.
> >
> > In some systems, it may be necessary to quickly reboot the system to
> > escape from a workqueue lockup situation. In this case, we can control
> > the number of stall detections to generate panic.
> >
> > workqueue.panic_on_stall sets the number times of the stall to trigger
> > panic. 0 disables the panic on stall.
> >
> > Signed-off-by: Sangmoon Kim <sangmoon.kim@...sung.com>
> 
> Appled to wq/for-6.12. Can you do a follow-up patch to document it in
> kernel-parameters?
> 
> Thanks.
> 
> --
> tejun

Okay. Let me prepare it.
Thanks

Sangmoon