From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756233Ab0IRUE0 (ORCPT ); Sat, 18 Sep 2010 16:04:26 -0400 Received: from moutng.kundenserver.de ([212.227.126.187]:54813 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756141Ab0IRUEX (ORCPT ); Sat, 18 Sep 2010 16:04:23 -0400 From: Arnd Bergmann To: Maxim Levitsky Subject: Re: PATA IDE is slower in newer versions of kernel Date: Sat, 18 Sep 2010 22:04:16 +0200 User-Agent: KMail/1.13.5 (Linux/2.6.36-rc4+; KDE/4.5.1; x86_64; ; ) Cc: Joshua Hintze , linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org References: <00d401cb55f7$33a78210$9af68630$@com> <010901cb5754$ae6735a0$0b35a0e0$@com> <1284837774.12425.1.camel@localhost.localdomain> In-Reply-To: <1284837774.12425.1.camel@localhost.localdomain> MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <201009182204.17255.arnd@arndb.de> X-Provags-ID: V02:K0:Gc/AvaiU9qr+5x0jpyDzLt3kG49RmriRN6/XWb3+gQo K6DWPMIav6mX53XvzLEBUyrDQHIam0HJxxfTaqvR88opNRWyFt wwdJTMHdEGDwqHmnE5L4kNP/g0UkF7zYFv3ZimymYq9uEPXSQH AYZw36yvYpzZYGaYUWOY9Vx5hkJ/xoZ6tSyeQriMJn2L1jWbD0 EQzal1+WQCLMrI0W9xSZw== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Saturday 18 September 2010 21:22:54 Maxim Levitsky wrote: > On Sat, 2010-09-18 at 11:12 -0600, Joshua Hintze wrote: > > I'm dedicated to continue working on the problem, I just need to advice from > > the linux community. I've tried different I/O schedulers such as noop and > > anticipatory and I'm studying the ide-dma code but still lost to where this > > is happening. > > > > Thanks! > > > Maybe you can just bisect this? That would probably help to pinpoint the problem. A regression somewhere between 2.6.10 and 2.6.32 is not that interesting when people are working on stabilizing 2.6.36 and adding features to 2.6.37. One important question would be if this happens with the libata drivers in 2.6.36-rc4 or linux-next as well. Note that the IDE subsystem has been replaced with libata a few years ago, and that is what all development happens on. If libata is good enough, there is probably no point in chasing down ide bugs. Arnd