linux-kernel - Re: [PATCH] mm: setup pageblock_order before it's used by sparse

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Date:	Wed, 18 Jul 2012 17:17:00 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Jiang Liu <jiang.liu@...wei.com>
Cc:	Yinghai Lu <yinghai@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mgorman@...e.de>, Tony Luck <tony.luck@...el.com>,
	Xishi Qiu <qiuxishi@...wei.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	David Rientjes <rientjes@...gle.com>,
	Minchan Kim <minchan@...nel.org>,
	Keping Chen <chenkeping@...wei.com>, linux-mm@...ck.org,
	stable@...r.kernel.org, linux-kernel@...r.kernel.org,
	Jiang Liu <liuj97@...il.com>,
	David Gibson <david@...son.dropbear.id.au>,
	linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH] mm: setup pageblock_order before it's used by sparse

On Tue, 2012-07-03 at 11:29 +0800, Jiang Liu wrote:
> OK, waiting response from PPC. If we could find some ways to set
> HPAGE_SIZE
> early on PPC too, we can setup pageblock_order in arch instead of
> page_alloc.c
> as early as possible. 

We could split our hugetlbpage_init() into two, with the bit that sets
HPAGE_SHIFT called earlier if it's really an issue.

Cheers,
Ben.


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