Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758297AbZANWxj (ORCPT ); Wed, 14 Jan 2009 17:53:39 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755364AbZANWx3 (ORCPT ); Wed, 14 Jan 2009 17:53:29 -0500 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.122]:60113 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755328AbZANWx2 (ORCPT ); Wed, 14 Jan 2009 17:53:28 -0500 Date: Wed, 14 Jan 2009 17:53:24 -0500 (EST) From: Steven Rostedt X-X-Sender: rostedt@gandalf.stny.rr.com To: "Eric W. Biederman" cc: Jon Masters , Ingo Molnar , Bjorn Helgaas , Stefan Assmann , Len Brown , Jesse Barnes , Olaf Dabrunz , Thomas Gleixner , Linux Kernel Mailing List , linux-acpi@vger.kernel.org, Sven Dietrich , "Maciej W. Rozycki" Subject: Re: PCI, ACPI, IRQ, IOAPIC: reroute PCI interrupt to legacy boot interrupt equivalent In-Reply-To: Message-ID: References: <496B24E5.1070804@suse.de> <200901121151.53195.bjorn.helgaas@hp.com> <1231806563.4094.25.camel@perihelion.bos.jonmasters.org> <20090113014723.GA11366@elte.hu> <1231820798.4094.34.camel@perihelion.bos.jonmasters.org> <20090114114006.GF8625@elte.hu> <1231960709.23174.0.camel@londonpacket.bos.redhat.com> User-Agent: Alpine 1.10 (DEB 962 2008-03-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 840 Lines: 31 On Wed, 14 Jan 2009, Eric W. Biederman wrote: > Jon Masters writes: > > Which leads me to conclude. > - IRQ handling in the RT kernel is hopelessly broken. > - IRQ threads are a bad idea. I would rephrase that to -- boot interrupts are hopelessly broken > > Because it is all leading to stupid patches and stupid development. Hmm, WTF should we have maskable interrupts for anyway? Sounds like broken hardware design to me. > > None of this works reliably on level triggered ioapic irqs. > I guess this means that ioapic's are not for RTOS of any kind. -- Steve -- 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/