linux-kernel - Re: [PATCH 1/3] Lumpy Reclaim V4

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Date:	Mon, 12 Mar 2007 11:36:16 -0700
From:	Dave Hansen <hansendc@...ibm.com>
To:	Andy Whitcroft <apw@...dowen.org>
Cc:	Andrew Morton <akpm@...l.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Mel Gorman <mel@....ul.ie>
Subject: Re: [PATCH 1/3] Lumpy Reclaim V4

On Mon, 2007-03-12 at 18:23 +0000, Andy Whitcroft wrote:
> 
> +                       /* The target page is in the block, ignore it. */
> +                       if (unlikely(pfn == page_pfn))
> +                               continue;
> +#ifdef CONFIG_HOLES_IN_ZONE
> +                       /* Avoid holes within the zone. */
> +                       if (unlikely(!pfn_valid(pfn)))
> +                               break;
> +#endif 

Would having something like:

        static inline int pfn_in_zone_hole(unsigned long pfn)
        {
        #ifdef CONFIG_HOLES_IN_ZONE
        	if (unlikely(!pfn_valid(pfn)))
        		return 1;
        #endif 
        	return 0;
        }
        
help us out?  page_is_buddy() and page_is_consistent() appear to do the
exact same thing, with the same #ifdef.

-- Dave

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