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Date: Sat, 30 Sep 2006 03:20:31 +0800
From: Eugene Grosbein <eugen@kuzbass.ru>
To: Martin Kammerhofer <dada@sbox.tugraz.at>
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Cc: freebsd-bugs@FreeBSD.org, "Bruce M. Simpson" <bms@FreeBSD.org>
Subject: Re: kern/51352: panic: malloc(M_WAITOK) in interrupt context
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> It's the same hardware (except now larger IDE disks) that produced the
> original panic. An Intel BX440 based motherboard, the Asus P2B-S. The
> BIOS is the latest 1013.
> ACPI does not work with this board, Linux automatically disables it at boot
> with a message like "P2B-S Rev. 0 motherboards have a known PCI
> interrupt routing problem". However APM works fine (except with a
> FreeBSD kernel with
> INVARIANTS).

I've experienced PCI routing problem with another Intel BX440 based
motherboard, the Iwill BD100+ using ACPI and FreeBSD >=5.x

I've found workaround for 6.x, use in /boot/loader.conf:

debug.acpi.disabled="pci_link"

Then 6.1/ACPI works fine with this 440BX motherboard. For details see:
http://www.FreeBSD.org/cgi/query-pr.cgi?pr=kern/91408

Hope this helps.

Eugene Grosbein