Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965374AbWHOOQ7 (ORCPT ); Tue, 15 Aug 2006 10:16:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965377AbWHOOQ7 (ORCPT ); Tue, 15 Aug 2006 10:16:59 -0400 Received: from 125.14.cm.sunflower.com ([24.124.14.125]:36743 "EHLO mail.atipa.com") by vger.kernel.org with ESMTP id S965373AbWHOOQ6 (ORCPT ); Tue, 15 Aug 2006 10:16:58 -0400 Message-ID: <44E1D760.6070600@atipa.com> Date: Tue, 15 Aug 2006 09:17:04 -0500 From: Roger Heflin User-Agent: Thunderbird 1.5 (X11/20060313) MIME-Version: 1.0 To: Linux-Kernel , linux-ide@vger.kernel.org Subject: What determines which interrupts are shared under Linux? Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 15 Aug 2006 14:17:16.0109 (UTC) FILETIME=[82941FD0:01C6C075] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2061 Lines: 46 Hello, On Linux when interrupts are defined similar to below, what defines say ide2, ide3 to be on the same interrupt? The bios, linux, the driver using the interrupt? And can that be controlled/overrode at the kernel/driver level? I have identified that the disks that are shared on ide2, ide3 do funny things when both are being heavily used (dma_expiry), this is an older driver versions but I have experienced it before with a lot newer driver, and a bios adjustment previously fixed a similar issue, so that may be what is needed in this case also, I am not sure how they fixed it, but I suspect that the setup the interrupt to not be shared. I have a large number of machines and under heavy loads all seem to duplicate the issue, and it always happens with the disks on ide2/ide3, never on the disk connected to ide4. CPU0 CPU1 CPU2 CPU3 0: 56616921 5359998 7002142 938817 XT-PIC timer 1: 8 88 96 0 IO-APIC-edge i8042 2: 0 0 0 0 XT-PIC cascade 4: 2091 100 208 2477 IO-APIC-edge serial 8: 0 0 0 0 IO-APIC-edge rtc 9: 0 0 0 0 IO-APIC-level acpi 20: 0 0 0 0 IO-APIC-level ehci_hcd 21: 0 950 401419 414482 IO-APIC-level ide4, ohci_hcd 22: 1165 1704243 576247 6796 IO-APIC-level ide2, ide3 47: 65971 0 0 0 IO-APIC-level eth0 NMI: 1 1 1 1 LOC: 69904264 69877733 69879541 69901903 ERR: 0 MIS: 105 Roger - 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/