linux-kernel - Re: [2/8,v3] NUMA Hotplug Emulator: infrastructure of NUMA hotplug emulation

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Message-ID: <20101118062715.GD17539@linux-sh.org>
Date:	Thu, 18 Nov 2010 15:27:15 +0900
From:	Paul Mundt <lethal@...ux-sh.org>
To:	Shaohui Zheng <shaohui.zheng@...el.com>
Cc:	David Rientjes <rientjes@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, haicheng.li@...ux.intel.com,
	ak@...ux.intel.com, shaohui.zheng@...ux.intel.com,
	Yinghai Lu <yinghai@...nel.org>,
	Haicheng Li <haicheng.li@...el.com>
Subject: Re: [2/8,v3] NUMA Hotplug Emulator: infrastructure of NUMA hotplug emulation

On Thu, Nov 18, 2010 at 12:14:07PM +0800, Shaohui Zheng wrote:
> On Wed, Nov 17, 2010 at 01:10:50PM -0800, David Rientjes wrote:
> > The idea that I've proposed (and you've apparently thought about and even 
> > implemented at one point) is much more powerful than that.  We need not 
> > query the state of hidden nodes that we've setup at boot but can rather 
> > use the amount of hidden memory to setup the nodes in any way that we want 
> > at runtime (various sizes, interleaved node ids, etc).
> 
> yes, if we select your proposal. we just mark all the nodes as POSSIBLE node.
> there is no hidden nodes any more. the node will be created after add memory
> to the node first time. 
> 
This is roughly what I had in mind in my N_HIDDEN review, so I quite
favour this approach.
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