On Wed, Apr 16, 2008 at 09:10:23AM -0700, Steve Franks wrote: > > freebsd-stable: as you can see, Roland has been teaching me about > crashdumps since my umass brought down one system, and is rather > unusable on another. Here's the kgdb output: > > Best, > Steve > > [EMAIL PROTECTED] /usr/obj/usr/src/sys/GENERIC]$ sudo kgdb kernel.debug > /var/crash/vmcore.3 > [GDB will not be able to debug user-mode threads: > /usr/lib/libthread_db.so: Undefined symbol "ps_pglobal_lookup"] > GNU gdb 6.1.1 [FreeBSD] > Copyright 2004 Free Software Foundation, Inc. > GDB is free software, covered by the GNU General Public License, and you are > welcome to change it and/or distribute copies of it under certain conditions. > Type "show copying" to see the conditions. > There is absolutely no warranty for GDB. Type "show warranty" for details. > This GDB was configured as "amd64-marcel-freebsd". > > Unread portion of the kernel message buffer: > > > Fatal trap 12: page fault while in kernel mode > cpuid = 0; apic id = 00 > fault virtual address = 0x0 > fault code = supervisor read instruction, page not present > instruction pointer = 0x8:0x0 > stack pointer = 0x10:0xffffffffa0208570 > frame pointer = 0x10:0xffffff0001e1ca00 > code segment = base 0x0, limit 0xfffff, type 0x1b > = DPL 0, pres 1, long 1, def32 0, gran 1 > processor eflags = interrupt enabled, resume, IOPL = 0 > current process = 12 (swi4: clock sio)
Odd. This doesn't seem to have anything to do with usb. It is in a
kernel thread that runs the clock and serial port.
> trap number = 12
> panic: page fault
> cpuid = 0
> Uptime: 32s
> Physical memory: 1002 MB
> Dumping 96 MB: 81 65 49 33 17
>
> #0 doadump () at pcpu.h:194
> 194 __asm __volatile("movq %%gs:0,%0" : "=r" (td));
> (kgdb)
If you give the 'bt' command (backtrace) here, what does it say?
Roland
--
R.F.Smith http://www.xs4all.nl/~rsmith/
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