From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266573AbUHWSiq (ORCPT ); Mon, 23 Aug 2004 14:38:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266585AbUHWSiR (ORCPT ); Mon, 23 Aug 2004 14:38:17 -0400 Received: from umhlanga.stratnet.net ([12.162.17.40]:58098 "EHLO umhlanga.STRATNET.NET") by vger.kernel.org with ESMTP id S266573AbUHWS2C (ORCPT ); Mon, 23 Aug 2004 14:28:02 -0400 To: Andi Kleen Cc: linux-kernel@vger.kernel.org Subject: Re: [PATCH] [broken?] Add MSI support to e1000 X-Message-Flag: Warning: May contain useful information References: <2wpoS-1ai-1@gated-at.bofh.it> <2wqXF-2jm-29@gated-at.bofh.it> From: Roland Dreier Date: Mon, 23 Aug 2004 11:26:30 -0700 In-Reply-To: (Andi Kleen's message of "Mon, 23 Aug 2004 20:17:32 +0200") Message-ID: <52acwlvhgp.fsf@topspin.com> User-Agent: Gnus/5.1006 (Gnus v5.10.6) XEmacs/21.4 (Security Through Obscurity, linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-OriginalArrivalTime: 23 Aug 2004 18:26:30.0514 (UTC) FILETIME=[B5D9BD20:01C4893E] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Andi> There seems to be something wrong with the MSI code in the Andi> kernel. I tried to add MSI support to the s2io driver on Andi> x86-64, but it just didn't work (/proc/interrupts still Andi> displayed IO-APIC mode). I haven't investigated in detail Andi> yet though. Hmm... I've not tried MSI on x86-64 (although I have tried it on Nocona running a 32-bit kernel). I have successfully used both MSI and MSI-X on i386 with my mthca (InfiniBand HCA) driver, although with some occasional stability glitches, which may be connected to the e1000 problem I'm seeing. In any case, /proc/interrupts definitely shows "PCI-MSI" mode with a non-zero number of interrupts delivered with my patched e1000 driver. - Roland