Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 25 Jul 2001 19:36:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 25 Jul 2001 19:36:11 -0400 Received: from router-100M.swansea.linux.org.uk ([194.168.151.17]:63240 "EHLO the-village.bc.nu") by vger.kernel.org with ESMTP id ; Wed, 25 Jul 2001 19:35:55 -0400 Subject: Re: how to tell Linux *not* to share IRQs ? To: vaxerdec@frontiernet.net (Scott McDermott) Date: Thu, 26 Jul 2001 00:37:08 +0100 (BST) Cc: linux-kernel@vger.kernel.org In-Reply-To: <20010725192342.A2453@vaxerdec.localdomain> from "Scott McDermott" at Jul 25, 2001 07:23:42 PM X-Mailer: ELM [version 2.5 PL5] MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-Id: From: Alan Cox Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Original-Recipient: rfc822;linux-kernel-outgoing > I cannot for the life of me get Linux to use all the available IRQs; it > insists on sharing IRQs even though there are enough available to give > each PCI device a separate one. The actual sharing rules for PCI interrupt lines are frequently determined by the actual wiring on the motherboard. It is quite possible the interrupt lines on some of your slots are physically wired together, and indeed quite likely that this is true if you have five or more slots > parallel and USB, giving all manner of "pci=" kernel parameters, tried > with APIC and without (even though it's UP, it seems to still use it if APIC can help by removing ISA/PCI sharing, but not PCI to PCI. Alan -- "Have you noticed the way people's intelligence capabilities decline sharply the minute they start waving guns around?" -- Dr. Who - 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/