Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262615AbUKXLNJ (ORCPT ); Wed, 24 Nov 2004 06:13:09 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262616AbUKXLNI (ORCPT ); Wed, 24 Nov 2004 06:13:08 -0500 Received: from mx1.elte.hu ([157.181.1.137]:155 "EHLO mx1.elte.hu") by vger.kernel.org with ESMTP id S262615AbUKXLND (ORCPT ); Wed, 24 Nov 2004 06:13:03 -0500 Date: Wed, 24 Nov 2004 13:15:22 +0100 From: Ingo Molnar To: Lee Revell Cc: linux-kernel@vger.kernel.org, Rui Nuno Capela , Mark_H_Johnson@Raytheon.com, "K.R. Foley" , Bill Huey , Adam Heath , Florian Schmidt , Thomas Gleixner , Michal Schmidt , Fernando Pablo Lopez-Lezcano , Karsten Wiese , Gunther Persoons , emann@mrv.com, Shane Shrybman , Amit Shah Subject: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm3-V0.7.31-1 Message-ID: <20041124121522.GA10110@elte.hu> References: <20041116130946.GA11053@elte.hu> <20041116134027.GA13360@elte.hu> <20041117124234.GA25956@elte.hu> <20041118123521.GA29091@elte.hu> <20041118164612.GA17040@elte.hu> <1100920963.1424.1.camel@krustophenia.net> <20041120125536.GC8091@elte.hu> <1100971141.6879.18.camel@krustophenia.net> <20041120191403.GA16262@elte.hu> <1100997121.1569.0.camel@krustophenia.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1100997121.1569.0.camel@krustophenia.net> 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: 1041 Lines: 26 * Lee Revell wrote: > > i only tried the !PREEMPT version though - does that one work for you? > > Yup, !PREEMPT works fine. Testing PREEMPT next. So far only > PREEMPT_VOLUNTARY fails to boot. found a bug that causes !PREEMPT boot failures. The seqlock type was wrong for the !RT case, resulting in a subtle bug: write_seqlock_irqsave() didnt actually disable interrupts. This results in a deadlock scenario in where the timer interrupt interrupts update_times (which runs in softirq context). I've uploaded the -31-1 patch with this fix included to the usual place: http://redhat.com/~mingo/realtime-preempt/ i'm cycling through the various options, but it's looking good so far, PREEMPT_NONE, PREEMPT_VOLUNTARY and PREEMPT_DESKTOP all booted up fine. 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/