Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759101AbXHULQR (ORCPT ); Tue, 21 Aug 2007 07:16:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756139AbXHULQD (ORCPT ); Tue, 21 Aug 2007 07:16:03 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:56035 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755462AbXHULQA (ORCPT ); Tue, 21 Aug 2007 07:16:00 -0400 Date: Tue, 21 Aug 2007 13:15:44 +0200 From: Ingo Molnar To: Christian Borntraeger Cc: Martin Schwidefsky , Linus Torvalds , Andrew Morton , linux-kernel@vger.kernel.org, Jan Glauber , heiko.carstens@de.ibm.com, Paul Mackerras Subject: Re: [accounting regression since rc1] scheduler updates Message-ID: <20070821111544.GA32064@elte.hu> References: <20070812163225.GA11996@elte.hu> <1187687476.7623.8.camel@localhost> <20070821093434.GB12025@elte.hu> <200708211243.15223.borntraeger@de.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200708211243.15223.borntraeger@de.ibm.com> User-Agent: Mutt/1.5.14 (2007-02-12) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: 0.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=0.5 required=5.9 tests=BAYES_40 autolearn=no SpamAssassin version=3.0.3 0.5 BAYES_40 BODY: Bayesian spam probability is 20 to 40% [score: 0.3750] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1034 Lines: 24 * Christian Borntraeger wrote: > Am Dienstag, 21. August 2007 schrieb Ingo Molnar: > > the 'invariant' i mentioned only covers scheduler behavior, not > > accounting behavior. Accounting is separate in theory, but coupled in > > practice now via sum_exec_runtime. > > Forgot to answer about that: That means that the current design does > not cover our requirement of showing process real time, even if we > implement sched_clock? In that case I would suggest to merge my patch > as a quick but correct solution and do it properly for 2.6.24. Of > course better solutions are welcome :-) you mean to revert b27f03d4bd? I'd really like to see this fixed for real for s390 + CONFIG_VIRT_CPU_ACCOUNTING=y. (which seems to be the only case affected) Ingo - 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/