Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262199AbUKKKgL (ORCPT ); Thu, 11 Nov 2004 05:36:11 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262204AbUKKKgL (ORCPT ); Thu, 11 Nov 2004 05:36:11 -0500 Received: from mx1.elte.hu ([157.181.1.137]:20418 "EHLO mx1.elte.hu") by vger.kernel.org with ESMTP id S262199AbUKKKgI (ORCPT ); Thu, 11 Nov 2004 05:36:08 -0500 Date: Thu, 11 Nov 2004 12:38:04 +0100 From: Ingo Molnar To: Mark_H_Johnson@raytheon.com Cc: Amit Shah , Karsten Wiese , Bill Huey , Adam Heath , emann@mrv.com, Gunther Persoons , "K.R. Foley" , linux-kernel@vger.kernel.org, Florian Schmidt , Fernando Pablo Lopez-Lezcano , Lee Revell , Rui Nuno Capela , Shane Shrybman , Thomas Gleixner , Michal Schmidt Subject: Re: [patch] Real-Time Preemption, -RT-2.6.10-rc1-mm3-V0.7.23 Message-ID: <20041111113804.GA16645@elte.hu> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.1i X-ELTE-SpamVersion: MailScanner 4.31.6-itk1 (ELTE 1.2) SpamAssassin 2.63 ClamAV 0.73 X-ELTE-VirusStatus: clean X-ELTE-SpamCheck: no X-ELTE-SpamCheck-Details: score=-2.201, required 5.9, BAYES_00 -4.90, SORTED_RECIPS 2.70 X-ELTE-SpamLevel: X-ELTE-SpamScore: -2 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1153 Lines: 25 * Mark_H_Johnson@raytheon.com wrote: > >you have to build another kernel for them. irqs-off and preempt-off > >timing can be mixed freely (and both can be enabled in the same kernel), > >but wakeup timing deserves its own .config space and since it's not > >mixable with the other two methods i didnt see much point in enabling > >all 3 at once with strange dependencies between them. Is this a big > >issue? Normally i think the wakeup timing is more than enough to get a > >feel of latencies, and if something specific is suspected the other ones > >can be turned on. > > Just that it takes an hour or so to rebuild the kernel plus the disk > storage to keep two kernels instead of one. ok, i added runtime configurability of the 3 options back, so that you can build all 3 in and switch between them via the preempt_wakeup_timing flag. Will be in the next release. 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/