panic

[John Baldwin]

On 23-Dec-2003 Danny Braniss wrote:
> for a long time, and on different hardware, writing to a local disk
> with data from the net (tar/dump etc) panics.
> 
> this one in particular, is quiet consistant:
> tar cf - -C /net/.... | tar xvpf -
> 
> Fatal trap 12: page fault while in kernel mode
> fault virtual address   = 0xc0f7
> fault code              = supervisor read, page not present
> instruction pointer     = 0x8:0xc05a1430
> stack pointer           = 0x10:0xc655d7e0
> frame pointer           = 0x10:0xc655d8bc
> code segment            = base 0x0, limit 0xfffff, type 0x1b
>                         = DPL 0, pres 1, def32 1, gran 1
> processor eflags        = interrupt enabled, resume, IOPL = 0
> current process         = 494 (tar)
> kernel: type 12 trap, code=0
> Stopped at      ip_output+0xe10:        leal    0xffffffd4(%ebp),%eax
> 
> any help I can provide?

A trace might help.  Also, if you have a debug kernel, doing
a gdb -k kernel.debug and 'l *0xc05a1430' will give the source
line that it crashed on.

-- 

John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/