kern/51352: panic: malloc(M_WAITOK) in interrupt context

Eugene Grosbein eugen at
Fri Sep 29 12:21:33 PDT 2006

> 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

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:


Then 6.1/ACPI works fine with this 440BX motherboard. For details see:

Hope this helps.

Eugene Grosbein

More information about the freebsd-bugs mailing list