From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail172.messagelabs.com (mail172.messagelabs.com [216.82.254.3]) by kanga.kvack.org (Postfix) with SMTP id 0B0966B0085 for ; Tue, 19 May 2009 04:06:34 -0400 (EDT) Received: from m2.gw.fujitsu.co.jp ([10.0.50.72]) by fgwmail5.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id n4J86coD032735 for (envelope-from kosaki.motohiro@jp.fujitsu.com); Tue, 19 May 2009 17:06:38 +0900 Received: from smail (m2 [127.0.0.1]) by outgoing.m2.gw.fujitsu.co.jp (Postfix) with ESMTP id F122D45DE6B for ; Tue, 19 May 2009 17:06:37 +0900 (JST) Received: from s2.gw.fujitsu.co.jp (s2.gw.fujitsu.co.jp [10.0.50.92]) by m2.gw.fujitsu.co.jp (Postfix) with ESMTP id A8A8945DE61 for ; Tue, 19 May 2009 17:06:37 +0900 (JST) Received: from s2.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s2.gw.fujitsu.co.jp (Postfix) with ESMTP id 729A5E3800D for ; Tue, 19 May 2009 17:06:37 +0900 (JST) Received: from ml14.s.css.fujitsu.com (ml14.s.css.fujitsu.com [10.249.87.104]) by s2.gw.fujitsu.co.jp (Postfix) with ESMTP id BDFE31DB8044 for ; Tue, 19 May 2009 17:06:36 +0900 (JST) From: KOSAKI Motohiro Subject: Re: [PATCH 2/3] vmscan: make mapped executable pages the first class citizen In-Reply-To: <20090519074925.GA690@localhost> References: <20090519161756.4EE4.A69D9226@jp.fujitsu.com> <20090519074925.GA690@localhost> Message-Id: <20090519170208.742C.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Date: Tue, 19 May 2009 17:06:35 +0900 (JST) Sender: owner-linux-mm@kvack.org To: Wu Fengguang Cc: kosaki.motohiro@jp.fujitsu.com, Christoph Lameter , Andrew Morton , LKML , Elladan , Nick Piggin , Johannes Weiner , Peter Zijlstra , Rik van Riel , "tytso@mit.edu" , "linux-mm@kvack.org" , "minchan.kim@gmail.com" List-ID: > > > Like the console mode, the absolute nr_mapped drops considerably - to 1/13 of > > > the original size - during the streaming IO. > > > > > > The delta of pgmajfault is 3 vs 107 during IO, or 236 vs 393 during the whole > > > process. > > > > hmmm. > > > > about 100 page fault don't match Elladan's problem, I think. > > perhaps We missed any addional reproduce condition? > > Elladan's case is not the point of this test. > Elladan's IO is use-once, so probably not a caching problem at all. > > This test case is specifically devised to confirm whether this patch > works as expected. Conclusion: it is. Dejection ;-) The number should address the patch is useful or not. confirming as expected is not so great. I don't think your patch is strange, but I really want to find reproduce way. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org