From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Fri, 13 May 2005 13:24:46 -0500
From: Robin Holt <holt@sgi.com>
Subject: Re: [RFC] consistency of zone->zone_start_pfn, spanned_pages
Message-ID: <20050513182446.GA23416@lnx-holt.americas.sgi.com>
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To: Dave Hansen <haveblue@us.ibm.com>
Cc: lhms <lhms-devel@lists.sourceforge.net>, linux-mm <linux-mm@kvack.org>
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On Fri, May 13, 2005 at 09:00:19AM -0700, Dave Hansen wrote:
> Any other ideas?

Not necessarily a good idea but how about...

static int bad_range(struct zone *zone, struct page *page)
{
	unsigned long start_pfn;
	unsigned long spanned_pages;

	do {
		start_pfn = zone->zone_start_pfn;
		spanned_pages = zone->spanned_pages;
	while (unlikely(start_pfn != zone->zone_start_pfn));

	if (page_to_pfn(page) >= start_pfn + spanned_pages;
		return 1;
}
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