RE: panic

From: John Baldwin (jhb_at_FreeBSD.org)
Date: 12/23/03

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    Date: Tue, 23 Dec 2003 12:02:30 -0500 (EST)
To: Danny Braniss <danny@cs.huji.ac.il>

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