Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756220Ab0FAMwp (ORCPT ); Tue, 1 Jun 2010 08:52:45 -0400 Received: from rcsinet10.oracle.com ([148.87.113.121]:38729 "EHLO rcsinet10.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755990Ab0FAMwn (ORCPT ); Tue, 1 Jun 2010 08:52:43 -0400 Date: Tue, 1 Jun 2010 08:44:40 -0400 From: Chris Mason To: Pekka Enberg Cc: tytso@mit.edu, Alex Buell , Mailing Lists - Kernel Developers , Eric Paris , Linus Torvalds , Arjan van de Ven , Ingo Molnar Subject: Re: Article in Phoronix about loss of performance in 2.6.35 release candidates Message-ID: <20100601124440.GE8980@think> Mail-Followup-To: Chris Mason , Pekka Enberg , tytso@mit.edu, Alex Buell , Mailing Lists - Kernel Developers , Eric Paris , Linus Torvalds , Arjan van de Ven , Ingo Molnar References: <1275347969.29006.5.camel@lithium.local.net> <20100601041028.GB4426@thunk.org> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) X-Auth-Type: Internal IP X-Source-IP: rcsinet13.oracle.com [148.87.113.125] X-CT-RefId: str=0001.0A090203.4C050102.0050:SCFMA4539811,ss=1,fgs=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1666 Lines: 42 On Tue, Jun 01, 2010 at 08:00:39AM +0300, Pekka Enberg wrote: > On Tue, Jun 1, 2010 at 7:10 AM, wrote: > > On Tue, Jun 01, 2010 at 12:19:29AM +0100, Alex Buell wrote: > >> http://www.phoronix.com/vr.php?view=14976 > >> > >> Question: Why? > > > > One of the theories that has been advanced is that it's simply this > > problem: > > > > ? ? ? ?http://lkml.org/lkml/2010/5/22/154 > > > > If so, it points out how idiotic Phoronix is about not being able to > > notice udev pegging the CPU at 100% being someone bad for its > > benchmark runs. ?:-) > > > > OTOH, this bug has been known for over a week, and it is sort sad that > > we haven't reverted this patch. ?It looks like the conversation has > > died, but without a fix? > > It's fixed by 1eb2cbb6d5efe129 so the problem doesn't exist for 2.6.35-r1. When I first read this email, I thought it meant the test was done on rc1, but reading the article: To cut to the chase, between the 22nd and 24th of May there looks to be at least one commit (though perhaps multiple based upon the different data) within the Linus Torvalds 2.6 Git tree that are negatively affecting many different server/desktop benchmarks. We waited nearly a week to see if these regressions would be organically caught and addressed, but they have not been at least of the Linux 2.6 Git state as of 2010-05-26. I'll give the udev fix a try w/the btrfs tests. -chris -- 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/