linux-kernel - Re: [PATCH] locking/lockdep: use pr_warn_once for reporting that lockdep is turned off

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Message-ID: <ba7d4412-2dfb-2e4c-52fc-ba8c305abaa8@I-love.SAKURA.ne.jp>
Date:   Thu, 21 Jul 2022 00:13:31 +0900
From:   Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] locking/lockdep: use pr_warn_once for reporting that
 lockdep is turned off

On 2022/07/20 23:59, Peter Zijlstra wrote:
> On Wed, Jul 20, 2022 at 10:01:36PM +0900, Tetsuo Handa wrote:
>> debug_show_all_locks() can be called for multiple times if
>> hung_task_call_panic = 0. No need to repeat this message.
> 
> That one extra line is really a problem?

When lockdep is turned off during boot or some testing, khungtaskd repeats
this message, and I feel this repeated message useless.