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Date: Wed, 16 Apr 2008 10:48:54 +0900
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
       Pekka Enberg <penberg@cs.helsinki.fi>,
       Christoph Lameter <clameter@sgi.com>, linux-kernel@vger.kernel.org,
       Mel Gorman <mel@csn.ul.ie>, Nick Piggin <npiggin@suse.de>,
       Andrew Morton <akpm@linux-foundation.org>,
       "Rafael J. Wysocki" <rjw@sisk.pl>, Yinghai.Lu@sun.com, apw@shadowen.org
Subject: Re: [patch] mm: sparsemem memory_present() memory corruption fix
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I'm sorry to be too late here..

On Wed, 16 Apr 2008 02:03:56 +0200
Ingo Molnar <mingo@elte.hu> wrote:

> Signed-off-by: Ingo Molnar <mingo@elte.hu>
> ---
>  mm/sparse.c |   10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> Index: linux/mm/sparse.c
> ===================================================================
> --- linux.orig/mm/sparse.c
> +++ linux/mm/sparse.c
> @@ -149,8 +149,18 @@ static inline int sparse_early_nid(struc
>  /* Record a memory area against a node. */
>  void __init memory_present(int nid, unsigned long start, unsigned long end)
>  {
> +	unsigned long max_arch_pfn = 1ULL << (MAX_PHYSMEM_BITS-PAGE_SHIFT);
>  	unsigned long pfn;
>  
how about

max_arch_pfn = NR_MEM_SECTIONS * PAGES_PER_SECTION.

?
Thanks,
-Kame