Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762013AbZD3MAR (ORCPT ); Thu, 30 Apr 2009 08:00:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755332AbZD3MAA (ORCPT ); Thu, 30 Apr 2009 08:00:00 -0400 Received: from yx-out-2324.google.com ([74.125.44.30]:53357 "EHLO yx-out-2324.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753136AbZD3L77 convert rfc822-to-8bit (ORCPT ); Thu, 30 Apr 2009 07:59:59 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type :content-transfer-encoding; b=nxTeL9N3V1i6QHoy5+0I1VayOxxoF+YgVxSvWsfrvJD0A9ZsylHFNNmWCzXpXCmq5c AK3pxg33GnbE+Y7ikyJ6VUCcQQwobOuML1kSHZT4TbwQKNuZ26v1AxnUyNsdnTzogfUw cfmOPxOwh78v3dwEqmlQ2123apZEQ8tGEKaZM= MIME-Version: 1.0 In-Reply-To: <20090429130430.4B11.A69D9226@jp.fujitsu.com> References: <20090428090916.GC17038@localhost> <20090428120818.GH22104@mit.edu> <20090429130430.4B11.A69D9226@jp.fujitsu.com> Date: Thu, 30 Apr 2009 20:59:59 +0900 X-Google-Sender-Auth: 09fbf6d364284ecb Message-ID: <2f11576a0904300459t61ae9619tcf8defacfc94f79@mail.gmail.com> Subject: Re: Swappiness vs. mmap() and interactive response From: KOSAKI Motohiro To: Theodore Tso , Wu Fengguang , Peter Zijlstra , KOSAKI Motohiro , Elladan , linux-kernel@vger.kernel.org, linux-mm , Rik van Riel Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1124 Lines: 27 > test environment: no lvm, copy ext3 to ext3 (not mv), no change swappiness, > ? ? ? ? ? ? ? ? ?CFQ is used, userland is Fedora10, mmotm(2.6.30-rc1 + mm patch), > ? ? ? ? ? ? ? ? ?CPU opteronx4, mem 4G > > mouse move lag: ? ? ? ? ? ? ? not happend > window move lag: ? ? ? ? ? ? ?not happend > Mapped page decrease rapidly: not happend (I guess, these page stay in > ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?active list on my system) > page fault large latency: ? ? happend (latencytop display >1200ms) > > > Then, I don't doubt vm replacement logic now. > but I need more investigate. > I plan to try following thing today and tommorow. > > ?- XFS > ?- LVM > ?- another io scheduler (thanks Ted, good view point) > ?- Rik's new patch hm, AS io-scheduler don't make such large latency on my environment. Elladan, Can you try to AS scheduler? (adding boot option "elevator=as") -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/