linux-kernel - Re: [PATCH] workqueue: avoid hard lockups in show_workqueue

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Message-ID: <20180112194047.GN3460072@devbig577.frc2.facebook.com>
Date:   Fri, 12 Jan 2018 11:40:47 -0800
From:   Tejun Heo <tj@...nel.org>
To:     Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
Cc:     Lai Jiangshan <jiangshanlai@...il.com>,
        linux-kernel@...r.kernel.org,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Subject: Re: [PATCH] workqueue: avoid hard lockups in show_workqueue_state()

On Thu, Jan 11, 2018 at 09:53:35AM +0900, Sergey Senozhatsky wrote:
> show_workqueue_state() can print out a lot of messages while being in
> atomic context, e.g. sysrq-t -> show_workqueue_state(). If the console
> device is slow it may end up triggering NMI hard lockup watchdog.
> 
> Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@...il.com>

Applied to wq/for-4.15-fixes.

Thanks.

-- 
tejun