linux-kernel - Re: [PATCH 18/21] x86, numa: Synchronize nid info in memblock.reserve with numa

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Message-ID: <20130723212548.GZ21100@mtj.dyndns.org>
Date:	Tue, 23 Jul 2013 17:25:48 -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 18/21] x86, numa: Synchronize nid info in
 memblock.reserve with numa_meminfo.

On Fri, Jul 19, 2013 at 03:59:31PM +0800, Tang Chen wrote:
> Vasilis Liaskovitis found that before we parse SRAT and fulfill numa_meminfo,
> the nids of all the regions in memblock.reserve[] are MAX_NUMNODES. That is
> because nids have not been mapped at that time.
> 
> When we arrange ZONE_MOVABLE in each node later, we need nid in memblock. So
> after we parse SRAT and fulfill nume_meminfo, synchronize the nid info to
> memblock.reserve[] immediately.

Having a separate sync is rather nasty.  Why not let
memblock_set_node() and alloc functions set nid on the reserved
regions?

Thanks.

-- 
tejun
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