From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755197Ab1IPOI4 (ORCPT ); Fri, 16 Sep 2011 10:08:56 -0400 Received: from minas.ics.muni.cz ([147.251.4.40]:37124 "EHLO minas.ics.muni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754995Ab1IPOIz (ORCPT ); Fri, 16 Sep 2011 10:08:55 -0400 Date: Fri, 16 Sep 2011 16:08:39 +0200 From: Lukas Hejtmanek To: Mike Snitzer Cc: Kiyoshi Ueda , "Jun'ichi Nomura" , agk@redhat.com, linux-kernel@vger.kernel.org Subject: Re: request baset device mapper in Linux Message-ID: <20110916140839.GE7428@ics.muni.cz> References: <20110720082640.GZ7561@ics.muni.cz> <4E280964.6070000@ct.jp.nec.com> <20110721132627.GY7561@ics.muni.cz> <4E291F28.2040609@ct.jp.nec.com> <20110722081903.GB7561@ics.muni.cz> <4E2A7806.1060601@ce.jp.nec.com> <20110724221619.GM16487@ics.muni.cz> <4E367256.8020206@ct.jp.nec.com> <20110908132756.GT31717@ics.muni.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-echelon: NSA, CIA, CI5, MI5, FBI, KGB, BIS, Plutonium, Bin Laden, bomb User-Agent: Mutt/1.5.21 (2010-09-15) X-Muni-Spam-TestIP: 147.251.17.147 X-Muni-Envelope-From: xhejtman@anubis.ics.muni.cz X-Muni-Virus-Test: Clean X-Greylist: Sender succeeded SMTP AUTH authentication, not delayed by milter-greylist-3.0 (minas.ics.muni.cz [147.251.4.35]); Fri, 16 Sep 2011 16:08:43 +0200 (CEST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Sep 15, 2011 at 02:49:52PM -0400, Mike Snitzer wrote: > Does "with your patch" mean against 3.0.3 or the original 2.6.32 kernel? > > If you apply the patch to the 3.0.3 kernel do you regain the performance? Unfortunately, the patch does not help with 3.0.3 kernel top looks like this: 63 root 20 0 0 0 0 S 38 0.0 0:16.65 kswapd1 18 root 20 0 0 0 0 R 32 0.0 0:14.38 kworker/4:0 19 root 20 0 0 0 0 R 30 0.0 0:20.88 ksoftirqd/4 153 root 20 0 0 0 0 R 29 0.0 0:14.46 kworker/4:2 62 root 20 0 0 0 0 S 22 0.0 0:09.44 kswapd0 16726 root 20 0 9484 1628 588 D 11 0.0 0:03.94 dd 16721 root 20 0 9484 1628 588 D 11 0.0 0:03.87 dd 16723 root 20 0 9484 1624 588 D 11 0.0 0:04.02 dd 16725 root 20 0 9484 1628 588 D 11 0.0 0:03.89 dd 16727 root 20 0 9484 1628 588 D 11 0.0 0:03.91 dd 16728 root 20 0 9484 1624 588 D 11 0.0 0:03.89 dd 16729 root 20 0 9484 1624 588 D 11 0.0 0:03.89 dd 16724 root 20 0 9484 1624 588 D 11 0.0 0:03.93 dd 16674 root 20 0 9484 1624 588 R 6 0.0 0:01.99 dd 16685 root 20 0 9484 1624 588 D 6 0.0 0:02.00 dd 16654 root 20 0 9484 1628 588 D 5 0.0 0:01.55 dd 16662 root 20 0 9484 1588 588 D 5 0.0 0:01.53 dd 16665 root 20 0 9484 1628 588 D 5 0.0 0:01.57 dd with patched 2.6.32, it looks like: 17330 root 20 0 9432 1752 616 D 4 0.0 0:00.34 dd 17335 root 20 0 9432 1756 616 D 4 0.0 0:00.35 dd 17316 root 20 0 9432 1756 616 D 4 0.0 0:00.34 dd 17318 root 20 0 9432 1756 616 D 4 0.0 0:00.34 dd 17322 root 20 0 9432 1756 616 D 4 0.0 0:00.34 dd 17323 root 20 0 9432 1756 616 D 4 0.0 0:00.33 dd 17324 root 20 0 9432 1756 616 D 4 0.0 0:00.34 dd 17325 root 20 0 9432 1756 616 D 4 0.0 0:00.34 dd 17326 root 20 0 9432 1756 616 D 4 0.0 0:00.33 dd 17327 root 20 0 9432 1756 616 D 4 0.0 0:00.34 dd 17328 root 20 0 9432 1756 616 D 4 0.0 0:00.34 dd 17329 root 20 0 9432 1756 616 D 4 0.0 0:00.34 dd 17333 root 20 0 9432 1756 616 D 4 0.0 0:00.34 dd 17336 root 20 0 9432 1756 616 D 4 0.0 0:00.35 dd 17344 root 20 0 9432 1756 616 D 4 0.0 0:00.32 dd 17317 root 20 0 9432 1756 616 D 4 0.0 0:00.33 dd 17319 root 20 0 9432 1752 616 D 4 0.0 0:00.34 dd 17320 root 20 0 9432 1756 616 D 4 0.0 0:00.33 dd 17321 root 20 0 9432 1756 616 D 4 0.0 0:00.33 dd 17331 root 20 0 9432 1756 616 R 4 0.0 0:00.33 dd 17332 root 20 0 9432 1756 616 D 4 0.0 0:00.34 dd 17334 root 20 0 9432 1756 616 D 4 0.0 0:00.34 dd unpatched 2.6.32 looks like: 4 root 20 0 0 0 0 R 100 0.0 0:25.60 ksoftirqd/0 19325 root 20 0 9432 1756 616 D 48 0.0 0:12.51 dd 19294 root 20 0 9432 1756 616 D 11 0.0 0:01.09 dd 19323 root 20 0 9432 1756 616 D 4 0.0 0:01.02 dd 19295 root 20 0 9432 1756 616 D 2 0.0 0:02.73 dd 19305 root 20 0 9432 1756 616 D 2 0.0 0:00.53 dd 19327 root 20 0 9432 1760 616 D 2 0.0 0:00.65 dd 19328 root 20 0 9432 1752 616 D 2 0.0 0:00.60 dd 19336 root 20 0 9432 1752 616 D 2 0.0 0:00.49 dd 19350 root 20 0 9432 1756 616 D 2 0.0 0:00.55 dd 19366 root 20 0 9432 1752 616 D 2 0.0 0:00.50 dd 19292 root 20 0 9432 1756 616 D 2 0.0 0:00.65 dd 19300 root 20 0 9432 1756 616 D 2 0.0 0:00.51 dd 19303 root 20 0 9432 1752 616 D 2 0.0 0:00.59 dd 19307 root 20 0 9432 1756 616 D 2 0.0 0:00.71 dd 19318 root 20 0 9432 1756 616 R 2 0.0 0:00.46 dd 19321 root 20 0 9432 1756 616 D 2 0.0 0:00.47 dd 19332 root 20 0 9432 1756 616 D 2 0.0 0:00.49 dd 19334 root 20 0 9432 1760 616 D 2 0.0 0:00.49 dd 19339 root 20 0 9432 1756 616 D 2 0.0 0:00.47 dd 19348 root 20 0 9432 1756 616 D 2 0.0 0:00.48 dd 19355 root 20 0 9432 1756 616 D 2 0.0 0:00.47 dd -- Lukáš Hejtmánek