Help debugging kernel BUG

[Ian Petersen]

On 11/9/07, Jamon Camisso <jamon.camisso-H217xnMUJC0sA/PxXw9srA at public.gmane.org> wrote:
> Try http://lkml.org/lkml/2007/8/22/189,

I did see that posting, but I assumed it was unrelated because that
poster is having problems booting a ppc64 machine, and it's the
2.6.23-mm kernel, whereas I'm running the 2.6.22-gentoo kernel.

> also, what kernel are you running?

2.6.22, the Gentoo-patched version.  (The package manager calls it
gentoo-sources.)

> Post the output of uname -a as a start.

Linux samwise 2.6.22-gentoo-r8 #3 SMP PREEMPT Thu Oct 18 02:23:06 EDT
2007 i686 Intel(R) Core(TM)2 CPU T7200 @ 2.00GHz GenuineIntel
GNU/Linux

> Distribution?

Gentoo.

> There
> may be a bug filed against your particular distro's kernel, or if
> you've rolled your own, you can use the patch posted in that link
> above.

I have rolled my own, in the sense that "installing" gentoo-sources
just puts a kernel source tree under /usr/src, and then I run make
config, followed by make install.  It's not the vanilla kernel,
though, so I'm wary of patching it.

As for distro-specific bugs against the kernel, I just searched
bugs.gentoo.org with only three results.  The following seems related:
http://bugs.gentoo.org/show_bug.cgi?id=67236.  I realized after my
first post that the last thing I changed before turning the machine
off last night was that I installed iptables and recompiled the kernel
modules after adding some NAT-related options to .config.  Would it
make sense that the iptables-related stuff could cause this problem?
lsmod | sort shows this (snipping module size and used-by fields):

Module
ac
acpi_cpufreq
battery
button
cdrom
configs
coretemp
cpufreq_ondemand
ehci_hcd
evdev
fan
freq_table
hwmon
mmc_core
msr
processor
psmouse
rtc
sdhci
sg
soundcore
sr_mod
tg3
thermal
uhci_hcd
unix
usbcore

The fact that there's no iptables-related modules loaded makes me
think it might be unrelated.

Ian

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