Cc: Adam Litke <agl@us.ibm.com>, linuxppc-dev <linuxppc-dev@ozlabs.org>,
       Adam Litke <agl@linux.vnet.ibm.com>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Linux Memory Management List <linux-mm@kvack.org>
Message-Id: <1DA7FAFA-0708-4CFC-B721-B09A29F45B3F@kernel.crashing.org>
From: Kumar Gala <galak@kernel.crashing.org>
To: Jon Tollefson <kniht@linux.vnet.ibm.com>
In-Reply-To: <48EA31D5.70609@linux.vnet.ibm.com>
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Subject: Re: [PATCH] properly reserve in bootmem the lmb reserved regions that cross numa nodes
Date: Mon, 6 Oct 2008 10:58:25 -0500
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On Oct 6, 2008, at 10:42 AM, Jon Tollefson wrote:

> Kumar Gala wrote:
>> Out of interest how to do you guys represent NUMA regions of memory  
>> in
>> the device tree?
>>
>> - k
> Looking at the source code in numa.c I see at the start of
> do_init_bootmem() that parse_numa_properties() is called.  It  
> appears to
> be looking at memory nodes and getting the node id from it.  It gets  
> an
> associativity property for the memory node and indexes that array  
> with a
> 'min_common_depth' value to get the node id.
>
> This node id is then used to setup the active ranges in the
> early_node_map[].
>
> Is this what you are asking about?  There are others I am sure who  
> know
> more about it then I though.

I was wondering if this was documented anywhere (like in sPAPR)?

- k
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