From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752584Ab0CQCnA (ORCPT ); Tue, 16 Mar 2010 22:43:00 -0400 Received: from fgwmail6.fujitsu.co.jp ([192.51.44.36]:56946 "EHLO fgwmail6.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751974Ab0CQCm7 (ORCPT ); Tue, 16 Mar 2010 22:42:59 -0400 X-SecurityPolicyCheck-FJ: OK by FujitsuOutboundMailChecker v1.3.1 From: KOSAKI Motohiro To: Mel Gorman Subject: Re: [PATCH 05/11] Export unusable free space index via /proc/unusable_index Cc: kosaki.motohiro@jp.fujitsu.com, Andrew Morton , Andrea Arcangeli , Christoph Lameter , Adam Litke , Avi Kivity , David Rientjes , Rik van Riel , linux-kernel@vger.kernel.org, linux-mm@kvack.org In-Reply-To: <1268412087-13536-6-git-send-email-mel@csn.ul.ie> References: <1268412087-13536-1-git-send-email-mel@csn.ul.ie> <1268412087-13536-6-git-send-email-mel@csn.ul.ie> Message-Id: <20100317114126.4C97.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: Becky! ver. 2.50.07 [ja] Date: Wed, 17 Mar 2010 11:42:53 +0900 (JST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > 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 > Reviewed-by: Minchan Kim > Acked-by: Rik van Riel thanks. Reviewed-by: KOSAKI Motohiro