linux-kernel - Re: [5/8,v3] NUMA Hotplug Emulator: support cpu probe/release in x86

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Message-ID: <20101121144511.GJ9099@hack>
Date:	Sun, 21 Nov 2010 22:45:11 +0800
From:	Américo Wang <xiyou.wangcong@...il.com>
To:	shaohui.zheng@...el.com
Cc:	akpm@...ux-foundation.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, haicheng.li@...ux.intel.com,
	lethal@...ux-sh.org, ak@...ux.intel.com,
	shaohui.zheng@...ux.intel.com, Ingo Molnar <mingo@...e.hu>,
	Len Brown <len.brown@...el.com>,
	Yinghai Lu <Yinghai.Lu@....COM>,
	Haicheng Li <haicheng.li@...el.com>
Subject: Re: [5/8,v3] NUMA Hotplug Emulator: support cpu probe/release in
	x86

On Wed, Nov 17, 2010 at 10:08:04AM +0800, shaohui.zheng@...el.com wrote:
>From: Shaohui Zheng <shaohui.zheng@...el.com>
>
>Add cpu interface probe/release under sysfs for x86. User can use this
>interface to emulate the cpu hot-add process, it is for cpu hotplug 
>test purpose. Add a kernel option CONFIG_ARCH_CPU_PROBE_RELEASE for this
>feature.
>
>This interface provides a mechanism to emulate cpu hotplug with software
> methods, it becomes possible to do cpu hotplug automation and stress
>testing.
>

Huh? We already have CPU online/offline...

Can you describe more about the difference?

Thanks.
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