linux-kernel - Re: [PATCH 1/2] Report the pagesize backing a VMA in /proc/pid/smaps

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Message-Id: <20080922013053.39fd367a.akpm@linux-foundation.org>
Date:	Mon, 22 Sep 2008 01:30:53 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Mel Gorman <mel@....ul.ie>
Cc:	LKML <linux-kernel@...r.kernel.org>, Linux-MM <linux-mm@...ck.org>
Subject: Re: [PATCH 1/2] Report the pagesize backing a VMA in
 /proc/pid/smaps

On Mon, 22 Sep 2008 02:38:11 +0100 Mel Gorman <mel@....ul.ie> wrote:

> +		   vma_page_size(vma) >> 10);
>  
>  	return ret;
>  }
> diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
> index 32e0ef0..0c83445 100644
> --- a/include/linux/hugetlb.h
> +++ b/include/linux/hugetlb.h
> @@ -231,6 +231,19 @@ static inline unsigned long huge_page_size(struct hstate *h)
>  	return (unsigned long)PAGE_SIZE << h->order;
>  }
>  
> +static inline unsigned long vma_page_size(struct vm_area_struct *vma)
> +{
> +	struct hstate *hstate;
> +
> +	if (!is_vm_hugetlb_page(vma))
> +		return PAGE_SIZE;
> +
> +	hstate = hstate_vma(vma);
> +	VM_BUG_ON(!hstate);
> +
> +	return 1UL << (hstate->order + PAGE_SHIFT);
> +}
> +

CONFIG_HUGETLB_PAGE=n?

What did you hope to gain by inlining this?
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