linux-kernel - Re: [PATCH 2/2] fix memmap init for handling memory hole

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Message-Id: <20090213151455.77CE.A69D9226@jp.fujitsu.com>
Date:	Fri, 13 Feb 2009 15:15:14 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	kosaki.motohiro@...fujitsu.com,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	davem@...emlloft.net, heiko.carstens@...ibm.com,
	Mel Gorman <mel@....ul.ie>
Subject: Re: [PATCH 2/2] fix memmap init for handling memory hole

> From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> 
> Now, early_pfn_in_nid(PFN, NID) may returns false if PFN is a hole.
> and memmap initialization was not done. This was a trouble for
> sparc boot.
> 
> To fix this, the PFN should be initialized and marked as PG_reserved.
> This patch changes early_pfn_in_nid() return true if PFN is a hole.
> 
> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>

at least, this patch works fine on my ia64 box.

	Tested-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>




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