7.0 CURRENT kernel's ath driver causes page fault, kernel panic (debugging kernel)

[Edward Ruggeri]

On Fri, Jul 18, 2008 at 7:25 PM, Edward Ruggeri <smallhand at crawblog.com> wrote:
> On Fri, Jul 18, 2008 at 7:13 AM, Robert Watson <rwatson at freebsd.org> wrote:
>> This is a NULL pointer dereference in the kernel, which almost certainly
>> means a kernel bug.  Per e-mail you've already received from Garrett Cooper,
>> we need some further debugging information, such as a kernel astack trace.
>>  If you're unable to get a dump, a DDB stack trace would probably help quite
>> a bit (options DDB, when it drops into the debugger, save the results of the
>> command "trace").  Please do a file a PR with those results.
>
> Will do.  I'll recompile the kernel tonight with the options Garrett's
> recommended, get a trace, and file a PR.  Thanks!
>
>> I'm a bit puzzled that your box is syncing after a panic -- normally the
>> kernel is configured not to do that -- could kern.sync_on_panic be set in
>> your loader.conf or sysctl.conf?
>
> Ah, I wondered if it was supposed to do that.  There's nothing in
> /etc/sysctl.conf, and only nvidia_load="YES" in /boot/loader.conf.  I
> ran sysctl -a subsequently, and it indicates that kern.sync_on_panic
> is (currently) zero.

I sent this to Robert Watson only, by mistake.  My apologies for
sending this twice to you now, Robert.

Thank you very much for your help!

-- Ned Ruggeri