linux-kernel - Re: [PATCH 05/11] Export unusable free space index via /proc/unusable

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Message-Id: <20100317114126.4C97.A69D9226@jp.fujitsu.com>
Date:	Wed, 17 Mar 2010 11:42:53 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Mel Gorman <mel@....ul.ie>
Cc:	kosaki.motohiro@...fujitsu.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Adam Litke <agl@...ibm.com>, Avi Kivity <avi@...hat.com>,
	David Rientjes <rientjes@...gle.com>,
	Rik van Riel <riel@...hat.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [PATCH 05/11] Export unusable free space index via /proc/unusable_index

> Unusable 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@....ul.ie>
> Reviewed-by: Minchan Kim <minchan.kim@...il.com>
> Acked-by: Rik van Riel <riel@...hat.com>

thanks.

Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>



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