linux-kernel - Re: [RFC PATCH 01/12] mm: add a new config to manage the code

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Date:	Tue, 09 Jun 2015 15:44:18 +0900
From:	Kamezawa Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Xishi Qiu <qiuxishi@...wei.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	nao.horiguchi@...il.com, Yinghai Lu <yinghai@...nel.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>, mingo@...e.hu,
	Xiexiuqi <xiexiuqi@...wei.com>,
	Hanjun Guo <guohanjun@...wei.com>,
	"Luck, Tony" <tony.luck@...el.com>
CC:	Linux MM <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH 01/12] mm: add a new config to manage the code

On 2015/06/04 21:56, Xishi Qiu wrote:
> This patch introduces a new config called "CONFIG_ACPI_MIRROR_MEMORY", it is
> used to on/off the feature.
>
> Signed-off-by: Xishi Qiu <qiuxishi@...wei.com>
> ---
>   mm/Kconfig | 8 ++++++++
>   1 file changed, 8 insertions(+)
>
> diff --git a/mm/Kconfig b/mm/Kconfig
> index 390214d..4f2a726 100644
> --- a/mm/Kconfig
> +++ b/mm/Kconfig
> @@ -200,6 +200,14 @@ config MEMORY_HOTREMOVE
>   	depends on MEMORY_HOTPLUG && ARCH_ENABLE_MEMORY_HOTREMOVE
>   	depends on MIGRATION
>
> +config MEMORY_MIRROR
> +	bool "Address range mirroring support"
> +	depends on X86 && NUMA
> +	default y
> +	help
> +	  This feature depends on hardware and firmware support.
> +	  ACPI or EFI records the mirror info.

default y...no runtime influence when the user doesn't use memory mirror ?

Thanks,
-Kame



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