linux-kernel - Re: [PATCH v3 2/2] locking/debug: Add a master lock debugging switch

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Message-ID: <45ebe079-e585-634d-2f40-f7ff781faa0c@redhat.com>
Date:   Wed, 28 Mar 2018 09:05:42 -0400
From:   Waiman Long <longman@...hat.com>
To:     Davidlohr Bueso <dave@...olabs.net>
Cc:     Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/2] locking/debug: Add a master lock debugging switch

On 03/27/2018 07:13 PM, Davidlohr Bueso wrote:
> On Tue, 27 Mar 2018, Waiman Long wrote:
>
>> Add a new master LOCK_DEBUGGING Kconfig option to turn on all the lock
>> debugging options except the selftests and the torture tests.
>
> For what purpose?
>
> I'm not sure we want yet another config debug option. These are all
> expert
> level configuration and honestly I would rather such users _think_ about
> what options they are enabling instead of giving them a large hammer.
>
> If enough load, this can also make boxes completely locked up for any
> sort of
> testing/debugging. I vote no.
>
> Also, CI efforts such 0-day already have the necessary scripting to
> cover the
> debug options that make sense.
>
> Thanks,
> Davidlohr

I think I misunderstood what the expectation is. I will send out an
updated patch to correct that.

Thanks,
Longman