From mboxrd@z Thu Jan  1 00:00:00 1970
From: James Bottomley <James.Bottomley@HansenPartnership.com>
Subject: Re: [PATCH v3] mm: make expand_downwards symmetrical to
 expand_upwards
Date: Wed, 20 Apr 2011 17:15:18 -0500
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	 <alpine.DEB.2.00.1104201410350.31768@chino.kir.corp.google.com>
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Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
	Pekka Enberg <penberg@kernel.org>,
	Christoph Lameter <cl@linux.com>,
	Michal Hocko <mhocko@suse.cz>,
	Andrew Morton <akpm@linux-foundation.org>,
	Hugh Dickins <hughd@google.com>, linux-mm@kvack.org,
	LKML <linux-kernel@vger.kernel.org>,
	linux-parisc@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
	x86 maintainers <x86@kernel.org>
To: David Rientjes <rientjes@google.com>
Return-path: <linux-parisc-owner@vger.kernel.org>
In-Reply-To: <alpine.DEB.2.00.1104201410350.31768@chino.kir.corp.google.com>
List-ID: <linux-parisc.vger.kernel.org>
List-Id: linux-parisc.vger.kernel.org

On Wed, 2011-04-20 at 14:18 -0700, David Rientjes wrote:
> This is probably because the parisc's DISCONTIGMEM memory ranges don't 
> have bits set in N_NORMAL_MEMORY.
> 
> diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
> --- a/arch/parisc/mm/init.c
> +++ b/arch/parisc/mm/init.c
> @@ -266,8 +266,10 @@ static void __init setup_bootmem(void)
>  	}
>  	memset(pfnnid_map, 0xff, sizeof(pfnnid_map));
>  
> -	for (i = 0; i < npmem_ranges; i++)
> +	for (i = 0; i < npmem_ranges; i++) {
> +		node_set_state(i, N_NORMAL_MEMORY);
>  		node_set_online(i);
> +	}
>  #endif

Yes, this seems to be the missing piece that gets it to boot.  We really
need this in generic code, unless someone wants to run through all the
other arch's doing it ...

James