Re: [PATCH] Default CONFIG_DEBUG_MUTEXES to n

[Adrian Bunk]

On Sat, Apr 15, 2006 at 03:45:38PM -0700, Martin J. Bligh wrote:
> CONFIG_DEBUG_MUTEXES has a significant performant impact (reduced perf
> of reaim by 50% on ia32 NUMA boxes). It should not be on by default.
> 
> Signed-off-by: Martin J. Bligh <mbligh@xxxxxxxxxx>
> 
> 

> diff -aurpN -X /home/mbligh/.diff.exclude linux-2.6.17-rc1/lib/Kconfig.debug 2.6.17-rc1_no_mutex_dbg/lib/Kconfig.debug
> --- linux-2.6.17-rc1/lib/Kconfig.debug	2006-04-15 15:28:54.000000000 -0700
> +++ 2.6.17-rc1_no_mutex_dbg/lib/Kconfig.debug	2006-04-15 15:44:14.000000000 -0700
> @@ -101,7 +101,7 @@ config DEBUG_PREEMPT
>  
>  config DEBUG_MUTEXES
>  	bool "Mutex debugging, deadlock detection"
> -	default y
> +	default n
>...
>  config DEBUG_SPINLOCK
>  	bool "Spinlock debugging"
> +	default n
>...

"default n" has no effect and can be removed.

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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