From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756481AbYDOHos (ORCPT ); Tue, 15 Apr 2008 03:44:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752783AbYDOHok (ORCPT ); Tue, 15 Apr 2008 03:44:40 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:52155 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752410AbYDOHoj (ORCPT ); Tue, 15 Apr 2008 03:44:39 -0400 Date: Tue, 15 Apr 2008 00:44:00 -0700 From: Andrew Morton To: "Yinghai Lu" Cc: "Eric W. Biederman" , "Thomas Gleixner" , "Ingo Molnar" , "Jeff Garzik" , "Ayaz Abdulla" , LKML , "Rafael J. Wysocki" Subject: Re: regression caused by: genirq: do not leave interupts enabled on free_irq Message-Id: <20080415004400.bb941191.akpm@linux-foundation.org> In-Reply-To: <86802c440804111248je6dfa99va8eec42531f4b689@mail.gmail.com> References: <86802c440804102313k4546cd73s7bffb30a14239472@mail.gmail.com> <86802c440804110014j44b32d16ubfaa0f327c3a384f@mail.gmail.com> <86802c440804110017y62938d90x7e3e32df25a60d1@mail.gmail.com> <1207899030.15605.1.camel@x61.ebiederm.org> <86802c440804111122x5c106779g60f1c04ae21fed94@mail.gmail.com> <86802c440804111248je6dfa99va8eec42531f4b689@mail.gmail.com> X-Mailer: Sylpheed 2.4.8 (GTK+ 2.12.5; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 11 Apr 2008 12:48:43 -0700 "Yinghai Lu" wrote: > On Fri, Apr 11, 2008 at 11:22 AM, Yinghai Lu wrote: > > On Fri, Apr 11, 2008 at 12:30 AM, Eric W. Biederman > > wrote: > > > > > > > > > > > > > On Fri, 2008-04-11 at 00:17 -0700, Yinghai Lu wrote: > > > > On Fri, Apr 11, 2008 at 12:14 AM, Yinghai Lu wrote: > > > > > On Fri, Apr 11, 2008 at 12:01 AM, Thomas Gleixner wrote: > > > > > > On Thu, 10 Apr 2008, Yinghai Lu wrote: > > > > > > > last week found: > > > > > > > after latest kernel kexec RHEL 5.1 or other stack kernel, the nvidia > > > > > > > forcedeth doesn't work anymore. > > > > > > > > > > > > > > I stared at forcedeth.c two days. and revert every patches about that > > > > > > > doesn't help. > > > > > > > > > > > > So forcedeth does not come up again, when you kexec from linus.git > > > > > > into an older distro kernel. Or is it the other way round ? > > > > > RHEL 5.1 kexec RHEL 5.1 : works > > > > > RHEL 5.1 kexec linus kernel: works > > > > > linus (after -rc2) kexec linus tree: works: > > > > > linus (after -rc2) kexec RHEL 5.1 : forcedeth will not come up > > > > > linus ( before -rc2 include rc2) kexec RHEL 5.1 works > > > > > > > > > the forcedeth can not get IP address... > > > > > > Sounds like you are not getting any interrupts when you receive a > > > packet. (i.e. The interrupt line is staying disabled). > > > > > > Is MSI an option here? I'm wondering if we disable the MSI and > > > something is not enabling it. > > > > > > > > after > > setpci -s 0x00:08.0 0x60.b=0xfe > > > > the eth0 can get ip address with ifup eth0. > > it is RHEL 5.1 problem...with msi. > > somehow msi entry msi_attrib_maskbit=is_mask_bit_support always get > 0...., and use msi_irq_wo_maskbit_type instead of > msi_irq_w_maskbit_type > > so when load that directly without kexec > that 0x60 always to 0x00. > > and this time kernel after 2.6.25-rc2 ( not included) really shutdown > the msi with 0xff the all maskbit... > So... where did this end up? It's a post-2.6.24 regression, isn't it? Do we think it's a bug in the RHEL 5.1 kernel? Even so, that's a problem for the 2.6.25 kernel.