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In-Reply-To: <1266516162-14154-7-git-send-email-mel@csn.ul.ie>
References: <1266516162-14154-1-git-send-email-mel@csn.ul.ie>
	 <1266516162-14154-7-git-send-email-mel@csn.ul.ie>
Date: Fri, 19 Feb 2010 10:35:38 +0900
Message-ID: <28c262361002181735w56ea868fmf778d3421bbecb31@mail.gmail.com>
Subject: Re: [PATCH 06/12] Export unusable free space index via 
	/proc/pagetypeinfo
From: Minchan Kim <minchan.kim@gmail.com>
To: Mel Gorman <mel@csn.ul.ie>
Cc: Andrea Arcangeli <aarcange@redhat.com>,
       Christoph Lameter <cl@linux-foundation.org>,
       Adam Litke <agl@us.ibm.com>, Avi Kivity <avi@redhat.com>,
       David Rientjes <rientjes@google.com>,
       KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
       Rik van Riel <riel@redhat.com>, linux-kernel@vger.kernel.org,
       linux-mm@kvack.org
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On Fri, Feb 19, 2010 at 3:02 AM, Mel Gorman <mel@csn.ul.ie> wrote:
> Unusuable free space index is a measure of external fragmentation that
> takes the allocation size into account. For the most part, the huge page
> size will be the size of interest but not necessarily so it is exported
> on a per-order and per-zone basis via /proc/unusable_index.
>
> The index is a value between 0 and 1. It can be expressed as a
> percentage by multiplying by 100 as documented in
> Documentation/filesystems/proc.txt.
>
> Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>

-- 
Kind regards,
Minchan Kim
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