linux-kernel - Re: [PATCH] rcu: remove duplicate CONFIG_RCU_CPU_STALL

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Date:	Wed, 21 Jan 2009 23:17:05 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Lai Jiangshan <laijs@...fujitsu.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] rcu: remove duplicate CONFIG_RCU_CPU_STALL_DETECTOR

On Thu, Jan 22, 2009 at 09:46:38AM +0800, Lai Jiangshan wrote:
> 
> Impact: remove the old CONFIG_RCU_CPU_STALL_DETECTOR
> 
> tree_rcu introduce CONFIG_RCU_CPU_STALL_DETECTOR again.
> 
> These two are the same exactly except:
> the old one "depends on CLASSIC_RCU"
> the new one "depends on CLASSIC_RCU || TREE_RCU"
> 
> This patch remove the old one.

Good eyes!

However, Jiri Kosina has already queued this up for the trivial tree:

	http://lkml.org/lkml/2009/1/15/218

						Thanx, Paul

> Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>
> ---
> diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
> index 4c9ae60..e770e85 100644
> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -633,19 +633,6 @@ config RCU_TORTURE_TEST_RUNNABLE
> 
>  config RCU_CPU_STALL_DETECTOR
>  	bool "Check for stalled CPUs delaying RCU grace periods"
> -	depends on CLASSIC_RCU
> -	default n
> -	help
> -	  This option causes RCU to printk information on which
> -	  CPUs are delaying the current grace period, but only when
> -	  the grace period extends for excessive time periods.
> -
> -	  Say Y if you want RCU to perform such checks.
> -
> -	  Say N if you are unsure.
> -
> -config RCU_CPU_STALL_DETECTOR
> -	bool "Check for stalled CPUs delaying RCU grace periods"
>  	depends on CLASSIC_RCU || TREE_RCU
>  	default n
>  	help
> 
> 
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