From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261461AbVGLOa4 (ORCPT ); Tue, 12 Jul 2005 10:30:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261457AbVGLO2p (ORCPT ); Tue, 12 Jul 2005 10:28:45 -0400 Received: from mx2.elte.hu ([157.181.151.9]:6891 "EHLO mx2.elte.hu") by vger.kernel.org with ESMTP id S261461AbVGLO20 (ORCPT ); Tue, 12 Jul 2005 10:28:26 -0400 Date: Tue, 12 Jul 2005 16:28:28 +0200 From: Ingo Molnar To: Daniel Walker Cc: Karsten Wiese , linux-kernel@vger.kernel.org Subject: Re: Real-Time Preemption, -RT-2.6.12-final-V0.7.50-24 Message-ID: <20050712142828.GA20798@elte.hu> References: <200507121223.10704.annabellesgarden@yahoo.de> <20050712140251.GB18296@elte.hu> <1121178339.10199.8.camel@c-67-188-6-232.hsd1.ca.comcast.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1121178339.10199.8.camel@c-67-188-6-232.hsd1.ca.comcast.net> User-Agent: Mutt/1.4.2.1i 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 * Daniel Walker wrote: > I observed a situation on a dual xeon where IOAPIC_POSTFLUSH , if on, > would actually cause spurious interrupts. It was odd cause it's > suppose to stop them .. If there was a lot of interrupt traffic on one > IRQ , it would cause interrupt traffic on another IRQ. This would > result in "nobody cared" messages , and the storming IRQ line would > get shutdown. > > This would only happen in PREEMPT_RT . does it happen with the latest kernel too? There were a couple of things broken in the IOAPIC code in various earlier versions. Ingo