From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263385AbTJKToT (ORCPT ); Sat, 11 Oct 2003 15:44:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263387AbTJKToT (ORCPT ); Sat, 11 Oct 2003 15:44:19 -0400 Received: from mail.gmx.de ([213.165.64.20]:60319 "HELO mail.gmx.net") by vger.kernel.org with SMTP id S263385AbTJKToE (ORCPT ); Sat, 11 Oct 2003 15:44:04 -0400 Date: Sat, 11 Oct 2003 21:44:03 +0200 (MEST) From: "Howard Duck" To: linux-kernel@vger.kernel.org MIME-Version: 1.0 Subject: observation: sata problems when using devfs with 2.6.0beta7 X-Priority: 3 (Normal) X-Authenticated: #295886 Message-ID: <25707.1065901443@www55.gmx.net> X-Mailer: WWW-Mail 1.6 (Global Message Exchange) X-Flags: 0001 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi I understand that devfs is deprecated, and i personally don't need (or suggest) this issue to be fixed - but there are maybe some people that run into this problem too, and they may profit from this information... Now here's the story: I have a intel 865pe based mainboard with 4 pata devices and one sata disk (the one i boot off). Gentoo linux "needs" devfs support therefore i added it to my kernel config. When i booted i got following warning/debug messages: irq: 18 nobody cared! *some hex output i was too lazy to write down* Disabling IRQ #18 IRQ 18 is assigned to the SATA controller (there are also a few lkml posts that describe this error). At first i thought it was some problem with sata - to verify this i started to test with a almost featureless kernel and added one feature after another to see what breaks the system. The irq18 problem only appeared when i added devfs support to the kernel. I have no real proof that devfs support affects the sata controller/disk, but i built many different kernel configs and whenever i added devfs support the irq18 warnings appeared, and whenever i removed devfs support they did not appear - so i guess devfs is the actual problem. I currently run gentoo-linux with a SMP enabled 2.6.0beta7 kernel with alsa and the nvidia-drivers but without devfs support. Everything works fine for me, seems like devfs support isn't that badly needed for gentoo ;) to turn off support for it simply add gentoo=nodevfs to your kernel boot-parameters. Creating the /dev entries for alsa can be done with the snddevices script provided by the alsa-driver source package. I didn't need any other /dev nodes, because i don't have USB peripherals and the likes... now on to the gentoo-developers persuading them to drop the devfs dependency ;) Michael Kefeder p.s.: i'm not subscribed to lkml - please put me on CC when answering. -- NEU FÜR ALLE - GMX MediaCenter - für Fotos, Musik, Dateien... Fotoalbum, File Sharing, MMS, Multimedia-Gruß, GMX FotoService Jetzt kostenlos anmelden unter http://www.gmx.net +++ GMX - die erste Adresse für Mail, Message, More! +++