Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753558Ab0LAO7w (ORCPT ); Wed, 1 Dec 2010 09:59:52 -0500 Received: from iolanthe.rowland.org ([192.131.102.54]:39866 "HELO iolanthe.rowland.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751736Ab0LAO7v (ORCPT ); Wed, 1 Dec 2010 09:59:51 -0500 Date: Wed, 1 Dec 2010 09:59:49 -0500 (EST) From: Alan Stern X-X-Sender: stern@iolanthe.rowland.org To: "Alexander E. Patrakov" cc: linux-kernel@vger.kernel.org, Subject: Re: Nobody cared about IRQs at shutdown In-Reply-To: <1291144540.5573.4.camel@Nokia-N900-51-1> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1521 Lines: 36 On Wed, 1 Dec 2010, Alexander E. Patrakov wrote: > Alan Stern wrote: > > On Tue, 30 Nov 2010, Alexander E. Patrakov wrote: > > > > > In fact, I think that there is something bad, not specific to USB, > > > FireWire or SATA. Without systemd, all those subsystems function > > > properly at shutdown. With systemd, it looks like there are many > > > mishandled interrupts (all of USB, FireWire and SATA) at shutdown. > > > What   could be this common thing? ACPI? > > > > I don't know -- what is systemd? > > Systemd is a new init developed by Lennart Poettering. You can learn more at http://freedesktop.org/wiki/Software/systemd > > It employs high concurrency in starting and stopping services, starts many things on demand and thus boots faster than the traditional SysV init. And also exposes this bug :( All right. One last test. What happens if you unbind the firewire driver and all the UHCI controllers except the one attached to IRQ 16? Possible explanations: IRQs are being misrouted, so the system thinks it gets IRQ 16 when in fact a different interrupt line was activated (this is related to ACPI, but I don't see any connection to systemd). Or the interrupt layer is malfunctioning and it thinks IRQs are arriving when they aren't. Alan Stern -- 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/