Re: [PATCH 08 of 66] fix bad_page to show the real reason the pageis bad

[Mel Gorman]

On Wed, Nov 03, 2010 at 04:27:43PM +0100, Andrea Arcangeli wrote:
> From: Andrea Arcangeli <aarcange@xxxxxxxxxx>
> 
> page_count shows the count of the head page, but the actual check is done on
> the tail page, so show what is really being checked.
> 
> Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
> Acked-by: Rik van Riel <riel@xxxxxxxxxx>
> Acked-by: Mel Gorman <mel@xxxxxxxxx>

This can be sent on its own as it's not really related to THP.

> ---
> 
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -5564,7 +5564,7 @@ void dump_page(struct page *page)
>  {
>  	printk(KERN_ALERT
>  	       "page:%p count:%d mapcount:%d mapping:%p index:%#lx\n",
> -		page, page_count(page), page_mapcount(page),
> +		page, atomic_read(&page->_count), page_mapcount(page),
>  		page->mapping, page->index);
>  	dump_page_flags(page->flags);
>  }
> 

-- 
Mel Gorman
Part-time Phd Student                          Linux Technology Center
University of Limerick                         IBM Dublin Software Lab
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