linux-kernel - Re: [RFC, 6/7] NUMA hotplug emulator

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Message-ID: <20100521101104.GB7906@in.ibm.com>
Date:	Fri, 21 May 2010 15:41:04 +0530
From:	Ankita Garg <ankita@...ibm.com>
To:	akpm@...ux-foundation.org, linux-mm@...ck.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	Andi Kleen <ak@...ux.intel.com>,
	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	linux-kernel@...r.kernel.org, haicheng.li@...ux.intel.com,
	shaohui.zheng@...ux.intel.com
Subject: Re: [RFC, 6/7] NUMA hotplug emulator

Hi,

On Thu, May 13, 2010 at 08:00:16PM +0800, Shaohui Zheng wrote:
> hotplug emulator:extend memory probe interface to support NUMA
> 
> Signed-off-by: Shaohui Zheng <shaohui.zheng@...el.com>
> Signed-off-by: Haicheng Li <haicheng.li@...el.com>
> Signed-off-by: Wu Fengguang <fengguang.wu@...el.com>
> ---
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index 54ccb0d..787024f 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -1239,6 +1239,17 @@ config ARCH_CPU_PROBE_RELEASE
>  	  is for cpu hot-add/hot-remove to specified node in software method.
>  	  This is for debuging and testing purpose
> 
> +config ARCH_MEMORY_PROBE

The above symbol exists already...

> +	def_bool y
> +	bool "Memory hotplug emulation"
> +	depends on NUMA_HOTPLUG_EMU
> +	---help---
> +	  Enable memory hotplug emulation. Reserve memory with grub parameter
> +	  "mem=N"(such as mem=1024M), where N is the initial memory size, the
> +	  rest physical memory will be removed from e820 table; the memory probe
> +	  interface is for memory hot-add to specified node in software method.
> +	  This is for debuging and testing purpose
> +
>  config NODES_SHIFT
>  	int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP
>  	range 1 10


-- 
Regards,                                                                        
Ankita Garg (ankita@...ibm.com)                                                 
Linux Technology Center                                                         
IBM India Systems & Technology Labs,                                            
Bangalore, India
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