Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758967AbZDFWaf (ORCPT ); Mon, 6 Apr 2009 18:30:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753972AbZDFWaZ (ORCPT ); Mon, 6 Apr 2009 18:30:25 -0400 Received: from ogre.sisk.pl ([217.79.144.158]:50184 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753840AbZDFWaY (ORCPT ); Mon, 6 Apr 2009 18:30:24 -0400 From: "Rafael J. Wysocki" To: Wu Fengguang Subject: Re: [Bug #12809] iozone regression with 2.6.29-rc6 Date: Tue, 7 Apr 2009 00:30:25 +0200 User-Agent: KMail/1.11.2 (Linux/2.6.29-rjw; KDE/4.2.2; x86_64; ; ) Cc: Linux Kernel Mailing List , Kernel Testers List , Andrew Morton , "Lin, Ming M" , Linus Torvalds , Nick Piggin , Peter Zijlstra , stable@kernel.org References: <20090406221509.GA17604@localhost> <20090406222037.GA18714@localhost> In-Reply-To: <20090406222037.GA18714@localhost> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200904070030.26367.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1944 Lines: 44 On Tuesday 07 April 2009, Wu Fengguang wrote: > On Tue, Apr 07, 2009 at 06:15:09AM +0800, Wu Fengguang wrote: > > On Tue, Apr 07, 2009 at 03:05:38AM +0800, Rafael J. Wysocki wrote: > > > This message has been generated automatically as a part of a report > > > of recent regressions. > > > > > > The following bug entry is on the current list of known regressions > > > from 2.6.28. Please verify if it still should be listed and let me know > > > (either way). > > > > > > > > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12809 > > > Subject : iozone regression with 2.6.29-rc6 > > > Submitter : Lin Ming > > > Date : 2009-02-27 9:13 (39 days old) > > > First-Bad-Commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=1cf6e7d83bf334cc5916137862c920a97aabc018 > > > References : http://marc.info/?l=linux-kernel&m=123572630504360&w=4 > > > http://lkml.org/lkml/2009/3/14/265 > > > Handled-By : Wu Fengguang > > > > > > > This bug could be closed. > > > > The performance regression is triggered by commit 1cf6e7d83bf3(mm: > > task dirty accounting fix). Which has been reverted in 2.6.29. > > Sorry for the mistake, commit 1cf6e7d83bf3 was _not_ reverted. > So 2.6.29 is expected to have this regression.. Added -stable to the CC list. I'm not sure if that was included into .29.1. > > For 2.6.30, commit 1cf6e7d83bf33(mm: task dirty accounting fix) and > > 1b5e62b42b55(writeback: double the dirty thresholds) were just merged > > together. The latter one restores the iozone performance. (However > > might deteriorate some writeback slowness bugs..) Thanks, I've closed the bug. Rafael -- 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/