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From: Holger Schurig <hs4233@mail.mn-solutions.de>
To: linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: OOPS: getting an ACPI interrupt while in an ACPI interrupt hangs my box
Date: Tue, 9 Sep 2008 16:05:07 +0200
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I just got this OOPS:

irq 9: nobody cared (try booting with the "irqpoll" option)
Pid: 0, comm: swapper Tainted: P          2.6.26.3 #3
 [<c012f063>] __report_bad_irq+0x24/0x69
 [<c012f06a>] __report_bad_irq+0x2b/0x69
 [<c012f257>] note_interrupt+0x1af/0x1e4
 [<c01cbc97>] acpi_irq+0xb/0x1c
 [<c012e983>] handle_IRQ_event+0x1a/0x3f
 [<c012f917>] handle_level_irq+0x63/0x84
 [<c01046d0>] do_IRQ+0x4b/0x60
 [<c010320f>] common_interrupt+0x23/0x28
 [<c01d007b>] acpi_ds_create_operands+0x1c/0xf9
 [<c0118f03>] __do_softirq+0x2c/0x75
 [<c0118f6e>] do_softirq+0x22/0x26
 [<c01191ea>] irq_exit+0x25/0x53
 [<c01046d5>] do_IRQ+0x50/0x60
 [<c010320f>] common_interrupt+0x23/0x28
 [<c01ef3c0>] acpi_idle_enter_simple+0x16d/0x1d9
 [<c025bdba>] cpuidle_idle_call+0x49/0x77
 [<c025bd71>] cpuidle_idle_call+0x0/0x77
 [<c010176c>] cpu_idle+0x48/0x61
 =======================
handlers:
[<c01cbc8c>] (acpi_irq+0x0/0x1c)
Disabling IRQ #9
BUG: soft lockup - CPU#0 stuck for 138s! [syslogd:1952]

If I read that OOPS right, then I got an interrupt 
("common_interrupt"), which made the kernel run the ACPI 
function "acpi_ds_create_operands" and while this executed, I've 
got another interupt, which killed my for for 138 seconds ...

Shouldn't there some sort of protection about this or is the DSDT 
of my device just bogus?




Kernel 2.6.26.3

CPU: "Geode(TM) Integrated Processor by AMD PCS"

How to reproduce: press ACPI buttons repeatedly

ACPI related kernel-commandline entries: "pci=noacpi 
acpi_serialize". The first is vital (no boot without), the 
second one is an experiment, I got OOPSes without that, too.