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Date: Fri, 21 May 2010 15:41:04 +0530
From: Ankita Garg <ankita@in.ibm.com>
To: akpm@linux-foundation.org, linux-mm@kvack.org,
       Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
       "H. Peter Anvin" <hpa@zytor.com>, x86@kernel.org,
       Andi Kleen <ak@linux.intel.com>,
       Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>,
       Greg Kroah-Hartman <gregkh@suse.de>,
       Wu Fengguang <fengguang.wu@intel.com>,
       Heiko Carstens <heiko.carstens@de.ibm.com>,
       linux-kernel@vger.kernel.org, haicheng.li@linux.intel.com,
       shaohui.zheng@linux.intel.com
Subject: Re: [RFC, 6/7] NUMA hotplug emulator
Message-ID: <20100521101104.GB7906@in.ibm.com>
Reply-To: Ankita Garg <ankita@in.ibm.com>
References: <20100513120016.GG2169@shaohui>
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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@intel.com>
> Signed-off-by: Haicheng Li <haicheng.li@intel.com>
> Signed-off-by: Wu Fengguang <fengguang.wu@intel.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@in.ibm.com)                                                 
Linux Technology Center                                                         
IBM India Systems & Technology Labs,                                            
Bangalore, India