From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756018AbYDXB6j (ORCPT ); Wed, 23 Apr 2008 21:58:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753409AbYDXB6b (ORCPT ); Wed, 23 Apr 2008 21:58:31 -0400 Received: from E23SMTP02.au.ibm.com ([202.81.18.163]:37555 "EHLO e23smtp02.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753316AbYDXB6a (ORCPT ); Wed, 23 Apr 2008 21:58:30 -0400 Date: Thu, 24 Apr 2008 07:28:14 +0530 From: Dhaval Giani To: David Miller Cc: a.p.zijlstra@chello.nl, mingo@elte.hu, vatsa@in.ibm.com, dmitry.adamushko@gmail.com, efault@gmx.de, lkml Subject: Re: [RFC][PATCH 1/2] sched: higher granularity load on 64bit systems Message-ID: <20080424015814.GA17190@linux.vnet.ibm.com> Reply-To: Dhaval Giani References: <1208988476.2849.8.camel@lappy> <20080423.172710.152976766.davem@davemloft.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080423.172710.152976766.davem@davemloft.net> User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Apr 23, 2008 at 05:27:10PM -0700, David Miller wrote: > From: Peter Zijlstra > Date: Thu, 24 Apr 2008 00:07:56 +0200 > > > The below is an RFC because for some reason it regresses kbuild by 5% on > > my machine (and more on the largesmp that are the reason for it). > > This causes my 64-cpu Niagara2 box to completely hang when I run "make > clean" on a kernel tree after a fresh bootup. > Any traces? Or anything? It stayed pretty stable on the 128 way I trying on, (but for the performance regression) and I was able to reproduce your group scheduler hang (or so i think, it might a separate one altogether.) > Can we just revert all of this broken code until it's sorted out? :-/ > > We're going on 4 days with unfixed major regressions from the > scheduler tree merge, and these regressions make systems unusable. > > This is blocking my own work, and I'm starting to lose my patience. -- regards, Dhaval