From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262609AbTJIV6m (ORCPT ); Thu, 9 Oct 2003 17:58:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262610AbTJIV6l (ORCPT ); Thu, 9 Oct 2003 17:58:41 -0400 Received: from fw.osdl.org ([65.172.181.6]:54735 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S262609AbTJIV6k (ORCPT ); Thu, 9 Oct 2003 17:58:40 -0400 Date: Thu, 9 Oct 2003 14:58:39 -0700 From: Chris Wright To: Martin Aspeli Cc: "linux-kernel@vger.kernel.org" Subject: Re: Horrible ordeals with ACPI, APIC and HIGHMEM (2.6.0-test* and -ac kernels) Message-ID: <20031009145839.A18072@build.pdx.osdl.net> References: <20031009140523.A18065@build.pdx.osdl.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: ; from optilude@gmx.net on Thu, Oct 09, 2003 at 10:26:41PM +0100 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * Martin Aspeli (optilude@gmx.net) wrote: > On Thu, 9 Oct 2003 14:05:23 -0700, Chris Wright wrote: > > > Which 2.6.0-test kernels? Have you tried 2.6.0-test7? A fix for this > > type of problem went into -test7. > > Sadly, yes. My most recent and most comprehensive tests (today) were with > the -test7 kernel. Could you give me some details as to what the fix is > supposed to do and why it may not work? fixes acpi pci link allocation which could pick a bad irq causing an interrupt storm. typical symptom was hang on boot. If you see: ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 6 7 10 *11 12) ... ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 6 where the link is not enabled at the current setting (11 in this case, marked by *), you might experience this kind of hang. > Also, I'd still be interested to know - what is "events/0"? events/0 is a kernel thread (keventd) used for scheduling work into process context. acpi uses keventd for handling acpi events, for example, so runaway apci events will cause events/0 to chew up cpu. > And why do > things run like a 286 when I enable HIGHMEM? I don't know, it shouldn't. thanks, -chris -- Linux Security Modules http://lsm.immunix.org http://lsm.bkbits.net