From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261466AbVGLOsF (ORCPT ); Tue, 12 Jul 2005 10:48:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261361AbVGLOrs (ORCPT ); Tue, 12 Jul 2005 10:47:48 -0400 Received: from relay03.pair.com ([209.68.5.17]:26119 "HELO relay03.pair.com") by vger.kernel.org with SMTP id S261493AbVGLOrL (ORCPT ); Tue, 12 Jul 2005 10:47:11 -0400 X-pair-Authenticated: 209.68.2.107 Message-ID: <42D3D7ED.7000805@cybsft.com> Date: Tue, 12 Jul 2005 09:47:09 -0500 From: "K.R. Foley" Organization: Cybersoft Solutions, Inc. User-Agent: Mozilla Thunderbird 1.0.2 (X11/20050317) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Ingo Molnar CC: Daniel Walker , Karsten Wiese , linux-kernel@vger.kernel.org Subject: Re: Real-Time Preemption, -RT-2.6.12-final-V0.7.50-24 References: <200507121223.10704.annabellesgarden@yahoo.de> <20050712140251.GB18296@elte.hu> <1121178339.10199.8.camel@c-67-188-6-232.hsd1.ca.comcast.net> <20050712142828.GA20798@elte.hu> In-Reply-To: <20050712142828.GA20798@elte.hu> X-Enigmail-Version: 0.89.5.0 X-Enigmail-Supports: pgp-inline, pgp-mime Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Ingo Molnar wrote: > * 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 Is this why I have been able to boot the latest versions without the noapic option (and without noticeable keyboard repeat problems) or has it just been dumb luck? -- kr