linux-kernel - Re: [patch 2/7] Immediate Values

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Message-Id: <20070917135517.2436c575.randy.dunlap@oracle.com>
Date:	Mon, 17 Sep 2007 13:55:17 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
Cc:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	Adrian Bunk <bunk@...sta.de>, Andi Kleen <andi@...stfloor.org>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Christoph Hellwig <hch@...radead.org>
Subject: Re: [patch 2/7] Immediate Values - Kconfig menu in EMBEDDED

On Mon, 17 Sep 2007 14:42:26 -0400 Mathieu Desnoyers wrote:

>  init/Kconfig |   21 +++++++++++++++++++++
>  1 file changed, 21 insertions(+)
> 
> Index: linux-2.6-lttng/init/Kconfig
> ===================================================================
> --- linux-2.6-lttng.orig/init/Kconfig	2007-09-04 11:53:59.000000000 -0400
> +++ linux-2.6-lttng/init/Kconfig	2007-09-04 12:12:03.000000000 -0400
> @@ -407,6 +407,17 @@ config CC_OPTIMIZE_FOR_SIZE
>  config SYSCTL
>  	bool
>  
> +config IMMEDIATE
> +	default y if !DISABLE_IMMEDIATE
> +	depends on X86_32 || PPC || PPC64
> +	bool
> +	help
> +	  Immediate values are used as read mostly variables that are rarely

                                       read-mostly

> +	  updated. They use code patching to modify the values inscribed in the
> +	  instruction stream. It provides a way to save precious cache lines

They .... (then) It ...
so choose one of the other.  I think I prefer "They".

> +	  that would otherwise have to be used by these variables. Can be
> +	  disabled through the EMBEDDED menu.
> +
>  menuconfig EMBEDDED
>  	bool "Configure standard kernel features (for small systems)"
>  	help

---
~Randy
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