linux-kernel - Re: [PATCH 14/16] x86: Unify CPU -> NUMA node mapping between 32 and 64bit

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Message-ID: <4D020B44.1040600@kernel.org>
Date:	Fri, 10 Dec 2010 12:13:08 +0100
From:	Tejun Heo <tj@...nel.org>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	linux-kernel@...r.kernel.org, mingo@...hat.com, hpa@...or.com,
	x86@...nel.org, eric.dumazet@...il.com, yinghai@...nel.org,
	brgerst@...il.com, gorcunov@...il.com, penberg@...nel.org
Subject: Re: [PATCH 14/16] x86: Unify CPU -> NUMA node mapping between 32
 and 64bit

On 12/09/2010 10:49 PM, Thomas Gleixner wrote:
> On Sat, 27 Nov 2010, Tejun Heo wrote:
> 
>> Unlike 64bit, 32bit has been using its own cpu_to_node_map[] for CPU
>> -> NUMA node mapping.  Replace it with early_percpu variable
>> x86_cpu_to_node_map and share the mapping code with 64bit.
>>
>> * USE_PERCPU_NUMA_NODE_ID is now enabled for 32bit too.
>>
>> * x86_cpu_to_node_map and numa_set/clear_node() are moved from numa_64
>>   to numa.  For now, x86_cpu_to_node_map is initialized with 0 instead
>>   of NUMA_NO_NODE.  This is to avoid introducing unexpected behavior
> 
> That's true for 32bit only, right? I actually had to dig into the code
> to verify this. Please make this clear for the casual reader.

Will do so.

Thanks.

-- 
tejun
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