From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751571AbXDEOfI (ORCPT ); Thu, 5 Apr 2007 10:35:08 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753134AbXDEOfI (ORCPT ); Thu, 5 Apr 2007 10:35:08 -0400 Received: from shawidc-mo1.cg.shawcable.net ([24.71.223.10]:37755 "EHLO pd2mo2so.prod.shaw.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751571AbXDEOfG (ORCPT ); Thu, 5 Apr 2007 10:35:06 -0400 Date: Thu, 05 Apr 2007 08:34:59 -0600 From: Robert Hancock Subject: Re: IRQ splitting In-reply-to: To: Jan Engelhardt Cc: Linux Kernel Mailing List Message-id: <46150913.4000406@shaw.ca> MIME-version: 1.0 Content-type: text/plain; charset=ISO-8859-1; format=flowed Content-transfer-encoding: 7bit References: User-Agent: Thunderbird 1.5.0.10 (Windows/20070221) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Jan Engelhardt wrote: > Hello list, > > > > let's take the following /proc/interrupts dump (CPU2,CPU3 trimmed)... > > CPU0 CPU1 > 0: 37041766 37038991 IO-APIC-edge timer > 1: 10 2 IO-APIC-edge i8042 > 8: 0 0 IO-APIC-edge rtc > 9: 0 0 IO-APIC-level acpi > 12: 114 0 IO-APIC-edge i8042 > 14: 25219 5800049 IO-APIC-edge ide0 > 201: 260381 238454 IO-APIC-level aacraid > 209: 0 0 IO-APIC-level ohci_hcd:usb1 > 217: 0 0 IO-APIC-level ehci_hcd:usb2 > 225: 57531742 0 IO-APIC-level eth0,radeon@pci:0000:03:00.0 > 233: 26 0 IO-APIC-level eth1 > NMI: 1661 1397 > LOC: 147579966 147579949 > ERR: 0 > MIS: 0 > > My question is whether it is possible that eth0's interrupts go to CPU0 > and radeon's to CPU1, and if so, how I would enable that. Alternatively, > is it possible to just move eth0 or radeon to a different interrupt? Generally (at least in APIC mode) the IRQ assignments are based on hard-wired interrupt lines on the board. In this case, the slots that the Radeon and eth0 card are in likely share a physical interrupt line and there is no way to separate them in software. You can try moving the card(s) to different slots.. -- Robert Hancock Saskatoon, SK, Canada To email, remove "nospam" from hancockr@nospamshaw.ca Home Page: http://www.roberthancock.com/