linux-kernel - Re: [PATCH 14/21] x86, acpi, numa: Reserve hotpluggable memory at early time.

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Message-ID: <20130726102714.GC30786@mtj.dyndns.org>
Date:	Fri, 26 Jul 2013 06:27:14 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Tang Chen <tangchen@...fujitsu.com>
Cc:	tglx@...utronix.de, mingo@...e.hu, hpa@...or.com,
	akpm@...ux-foundation.org, trenn@...e.de, yinghai@...nel.org,
	jiang.liu@...wei.com, wency@...fujitsu.com, laijs@...fujitsu.com,
	isimatu.yasuaki@...fujitsu.com, izumi.taku@...fujitsu.com,
	mgorman@...e.de, minchan@...nel.org, mina86@...a86.com,
	gong.chen@...ux.intel.com, vasilis.liaskovitis@...fitbricks.com,
	lwoodman@...hat.com, riel@...hat.com, jweiner@...hat.com,
	prarit@...hat.com, zhangyanfei@...fujitsu.com,
	yanghy@...fujitsu.com, x86@...nel.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-acpi@...r.kernel.org
Subject: Re: [PATCH 14/21] x86, acpi, numa: Reserve hotpluggable memory at
 early time.

On Fri, Jul 26, 2013 at 06:26:09AM -0400, Tejun Heo wrote:
> > So how about this.
> > 1. Introduce a new global list used to store hotpluggable regions.
> > 2. On acpi side, find and fulfill the list.
> > 3. On memblock side, make the default allocation function stay away from
> >    these regions.
> 
> I was thinking more along the line of
> 
> 1. Mark hotpluggable regions with a flag in memblock.
> 2. On ACPI side, find and mark hotpluggable regions.
> 3. Make memblock avoid giving out hotpluggable regions for normal
>    allocations.

But adding new regions array is more convenient / cleaner, that's fine
too.  Those arrays are dynamically sized anyway.

Thanks.

-- 
tejun
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