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Subject: Re: [PATCH] mm: setup pageblock_order before it's used by sparse
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Yinghai Lu <yinghai@kernel.org>
Cc: Mel Gorman <mgorman@suse.de>, Jiang Liu <jiang.liu@huawei.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Tony Luck <tony.luck@intel.com>,
	Xishi Qiu <qiuxishi@huawei.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
	David Rientjes <rientjes@google.com>,
	Minchan Kim <minchan@kernel.org>,
	Keping Chen <chenkeping@huawei.com>, linux-mm@kvack.org,
	stable@vger.kernel.org, linux-kernel@vger.kernel.org,
	Jiang Liu <liuj97@gmail.com>
Date: Fri, 06 Jul 2012 11:24:27 +1000
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On Thu, 2012-07-05 at 18:00 -0700, Yinghai Lu wrote:
> cma, dma_continugous_reserve is referring pageblock_order very early
> too.
> just after init_memory_mapping() for x86's setup_arch.
> 
> so set pageblock_order early looks like my -v2 patch is right way.
> 
> current question: need to powerpc guys to check who to set that early.

I missed the beginning of that discussion, I'll try to dig a bit,
might take me til next week though as I'm about to be off for
the week-end.

Cheers,
Ben.