mtrash_ctor panic caused by ACPI and ATAng was Re:Interrupts, ATAng, and wayward pointers, oh my!

[Doug White]

On Fri, 6 Feb 2004, Steve Kargl wrote:

> Yes, intriguing.  I used the better part of 1 day to eliminate
> possibilities for the problem.  I forgot to mention the problem
> does not depend on APIC or no APIC support in the kernel.
>
> > > PS: No, I can't get a core dump because the disk subsystem isn't
> > >     ready for a dump when the panics occurred and I can't hook
> > >     up a serial console.  I can panic the machine as needed.
> >
> > You can say 'set dumpdev=/dev/foo0s1b' in loader to set the dump target.
> >
>
> This doesn't work unless I can get a near instantaneous dump. That is,
> db> call dumpsys
> returns in under a second.  Revision 1.19 of ata-queue.c (note the
> typo of ata-queue.h above) reworked the locking of ATA.  I suspect
> that my laptop is tickling some race that Soren hasn't seen.

try 'call doadump()'

-- 
Doug White                    |  FreeBSD: The Power to Serve
dwhite at gumbysoft.com          |  www.FreeBSD.org