linux-kernel - Re: [PATCH tip/core/rcu 24/24] rcu: Conditionally compile RCU's eqs warnings

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Message-ID: <20150513094648.72e03399@gandalf.local.home>
Date:	Wed, 13 May 2015 09:46:48 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, mingo@...nel.org,
	laijs@...fujitsu.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
	josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
	dhowells@...hat.com, edumazet@...gle.com, dvhart@...ux.intel.com,
	fweisbec@...il.com, oleg@...hat.com, bobby.prani@...il.com
Subject: Re: [PATCH tip/core/rcu 24/24] rcu: Conditionally compile RCU's eqs
 warnings

On Tue, 12 May 2015 15:30:54 -0700
"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> wrote:

> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -1373,6 +1373,17 @@ config RCU_TRACE
>  	  Say Y here if you want to enable RCU tracing
>  	  Say N if you are unsure.
>  
> +config RCU_EQS_DEBUG
> +	bool "Use this when adding any sort of NO_HZ support to your arch"
> +	depends on DEBUG_KERNEL

Should we add "depends on NO_HZ" ?

-- Steve

> +	help
> +	  This option provides consistency checks in RCU's handling of
> +	  NO_HZ.  These checks have proven quite helpful in detecting
> +	  bugs in arch-specific NO_HZ code.
> +
> +	  Say N here if you need ultimate kernel/user switch latencies
> +	  Say Y if you are unsure
> +
>  endmenu # "RCU Debugging"
>  
>  config DEBUG_BLOCK_EXT_DEVT

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