Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262362AbUJ0LIn (ORCPT ); Wed, 27 Oct 2004 07:08:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262374AbUJ0LIn (ORCPT ); Wed, 27 Oct 2004 07:08:43 -0400 Received: from mx2.elte.hu ([157.181.151.9]:32176 "EHLO mx2.elte.hu") by vger.kernel.org with ESMTP id S262362AbUJ0LIl (ORCPT ); Wed, 27 Oct 2004 07:08:41 -0400 Date: Wed, 27 Oct 2004 13:09:39 +0200 From: Ingo Molnar To: Florian Schmidt Cc: "K.R. Foley" , linux-kernel@vger.kernel.org, Lee Revell , Rui Nuno Capela , Mark_H_Johnson@Raytheon.com, Bill Huey , Adam Heath , Thomas Gleixner , Michal Schmidt , Fernando Pablo Lopez-Lezcano , Alexander Batyrshin Subject: Re: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0 Message-ID: <20041027110939.GA30381@elte.hu> References: <20041025203807.GB27865@elte.hu> <417E2CB7.4090608@cybsft.com> <20041027002455.GC31852@elte.hu> <417F16BB.3030300@cybsft.com> <20041027082831.GA15192@elte.hu> <20041027084401.GA15989@elte.hu> <20041027085221.GA16742@elte.hu> <20041027090620.GA17621@elte.hu> <20041027123329.14570992@mango.fruits.de> <20041027124524.693161b8@mango.fruits.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20041027124524.693161b8@mango.fruits.de> 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=-4.9, required 5.9, autolearn=not spam, BAYES_00 -4.90 X-ELTE-SpamLevel: X-ELTE-SpamScore: -4 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1171 Lines: 30 * Florian Schmidt wrote: > ah, and btw: what does the /proc/sys/kernel/kernel_preemption tunable > do with PREEMPT_REALTIME enabled? it's pretty pointless to offer this tunable, agreed. In theory one could try to turn off involuntary preemption but what's the point? > mango:~# cat /proc/sys/kernel/kernel_preemption > 1 > > [all the other VP tunables are not available anymore] > > mango:~# cat /proc/sys/kernel/voluntary_preemption > cat: /proc/sys/kernel/voluntary_preemption: No such file or directory > mango:~# cat /proc/sys/kernel/hardirq_preemption > cat: /proc/sys/kernel/hardirq_preemption: No such file or directory > mango:~# cat /proc/sys/kernel/softirq_preemption > cat: /proc/sys/kernel/softirq_preemption: No such file or directory right - the PREEMPT_REALTIME kernel is only correct if all asynchronous processing is done in a process context, so i removed those tunables. 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/