linux-kernel - Re: [PATCH v4 2/2] locking/debug: Restructure the lock debugging menu

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Date:   Fri, 30 Mar 2018 13:17:56 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     Waiman Long <longman@...hat.com>
Cc:     Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org, Davidlohr Bueso <dave@...olabs.net>
Subject: Re: [PATCH v4 2/2] locking/debug: Restructure the lock debugging menu


* Waiman Long <longman@...hat.com> wrote:

> Two config options in the lock debugging menu that are probably the most
> frequently used, as far as I am concerned, is the PROVE_LOCKING and
> LOCK_STAT. From a UI perspective, they should be front and center. So
> these two options are now moved to the top of the lock debugging menu.
> 
> The DEBUG_WW_MUTEX_SLOWPATH option is also added to the PROVE_LOCKING
> umbrella.
> 
> Signed-off-by: Waiman Long <longman@...hat.com>
> ---
>  lib/Kconfig.debug | 146 ++++++++++++++++++++++++++++--------------------------
>  1 file changed, 76 insertions(+), 70 deletions(-)
> 
> diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
> index 6aad28c..dc9ffe2 100644
> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -1034,6 +1034,79 @@ config DEBUG_PREEMPT
>  
>  menu "Lock Debugging (spinlocks, mutexes, etc...)"
>  
> +config LOCK_DEBUGGING_SUPPORT
> +	bool
> +	depends on TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
> +	default y

Ok, this patch is a nice reorganization - but could we please split this into two 
patches, the first one adds the LOCK_DEBUGGING_SUPPORT helper, the other does the 
reordering of the entries (without changing anything in the entries)?

It's hard to review when the two steps are mixed up.

Thanks,

	Ingo