linux-kernel - Re: [PATCH 3/5] x86, acpi, cpu-hotplug: Introduce apicid_to_cpuid[] array to store persistent cpuid <-> apicid mapping.

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Date:	Wed, 15 Jul 2015 13:35:05 +0800
From:	Jiang Liu <jiang.liu@...ux.intel.com>
To:	Tang Chen <tangchen@...fujitsu.com>,
	Mika Penttilä <mika.j.penttila@...il.com>
CC:	rjw@...ysocki.net, gongzhaogang@...pur.com, x86@...nel.org,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [PATCH 3/5] x86, acpi, cpu-hotplug: Introduce apicid_to_cpuid[]
 array to store persistent cpuid <-> apicid mapping.

On 2015/7/15 11:33, Tang Chen wrote:
> Hi Mika,
> 
> On 07/07/2015 07:14 PM, Mika Penttilä wrote:
>> I think you forgot to reserve CPU 0 for BSP in cpuid mask.
> 
> Sorry for the late reply.
> 
> I'm not familiar with BSP.  Do you mean in get_cpuid(),
> I should reserve 0 for physical cpu0 in BSP ?
> 
> Would you please share more detail ?

BSP stands for "Bootstrapping Processor". In other word,
BSP is CPU0.
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