linux-kernel - Re: [PATCH] [5/8] Fix logic error in 64bit memory hotadd

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Message-Id: <20080212190310.F9E8.Y-GOTO@jp.fujitsu.com>
Date:	Tue, 12 Feb 2008 19:35:22 +0900
From:	Yasunori Goto <y-goto@...fujitsu.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	tglx@...utronix.de, linux-kernel@...r.kernel.org,
	Andi Kleen <ak@...e.de>
Subject: Re: [PATCH] [5/8] Fix logic error in 64bit memory hotadd

Hi Ingo-san.

> > Does anyone even  
> > use memory hotplug currently? 
> 
> I don't know.

IBM's powerpc box can memory hot-add/remove by dynamic partitioning.
And our fujitsu server has memory hot-add feature (Ia-64).
So, they are concrete user of memory hotplug.

In x86, E8500 chipset has the feature of memory-hotplug.
(I searched a data-sheet from intel site.)
http://download.intel.com/design/chipsets/e8500/datashts/30674501.pdf
(6.3.8 IMI Hot-Plug)

So, it depends on how many server uses it, I think.

Thanks.

-- 
Yasunori Goto 

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