linux-kernel - Re: preemptible RCU bug (was Re: [git pull] scheduler changes for v2.6.25)

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Date:	Sun, 27 Jan 2008 12:16:49 +0100
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	paulmck@...ux.vnet.ibm.com
CC:	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org
Subject: Re: preemptible RCU bug (was Re: [git pull] scheduler changes for
 v2.6.25)

Paul E. McKenney wrote:
> --- linux-2.6.24-rt1/kernel/Kconfig.preempt	2008-01-27 02:52:36.000000000 -0800
> +++ linux-2.6.24-rt1-RCUconfighelp/kernel/Kconfig.preempt	2008-01-27 03:05:22.000000000 -0800
> @@ -131,6 +131,14 @@ choice
>  	prompt "RCU implementation type:"
>  	default PREEMPT_RCU if PREEMPT_RT
>  	default CLASSIC_RCU
> +	help
> +	  This allows you to choose either the classic RCU implementation
> +	  that is designed for best read-side performance on non-realtime
> +	  systems, or the preemptible RCU implementation for best latency
> +	  on realtime systems.  Note that some kernel preemption modes
> +	  will restrict your choice.
> +
> +	  Select the default if you are unsure.

Looks good to me.  Serves those people who want to be informed as well
as those who want to be comforted.  :-)  Thanks,
-- 
Stefan Richter
-=====-==--- ---= ==-==
http://arcgraph.de/sr/
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