Date: Thu, 4 Jan 2007 20:47:17 -0700 From: "christopher floess" <skeptikos@gmail.com> To: freebsd-questions@freebsd.org Subject: fatal trap 12, can't get core Message-ID: <d7a53080701041947u5f29f1c6q782b41238b00dbd5@mail.gmail.com>
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Hi, I'm running 5.4 with a modified GENERIC kernel, and I recently rebooted
my system to find out that it hangs on probing ad1 with a fatal trap 12.
Here's the entire error message
ad1 Timeout - Read_dma retrying (2 retries left) LBA 117231345
kernel trap 12 with interrupts disabled
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x6c
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc063fb59
stack pointer = 0x10:0xde0fac40
frame pointer = 0x10:0xde0fac44
code segment = base 0x0, limit 0xfffff, type ox1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = resume, IOPL = 0
current process = 6(thread taskq)
trap number = 12
panic: page fault
cannot dump. no dump device
In my rc.conf I've got
dumpdev="/dev/ad0s1b"
dumpdir="/usr/crash"
For some reason it still says "no dump device".
Right now I'm able to boot my system into safe mode, but not single
user or normal. I
think I might not be able to get core dumps b/c my system doesn't get far
enough in the boot process, so I'm trying to follow the directions here
http://www.freebsd.org/doc/en_US.ISO8859-1/books/faq/advanced.html#KERNEL-PANIC-TROUBLESHOOTING
but I'm not sure about this part of the instructions
% nm -n /kernel.that.caused.the.panic | grep f0xxxxxx
Do I need to replace "/kernel.that.caused.the.panic" with
/boot/kernel/kernel? If so, here' is the out put of
> nm -n /boot/kernel/kernel | grep c063fb59
c063fb3c t init_turnstile0
c063fb4c t turnstile_setowner
c063fb78 T turnstile_alloc
c063fbb0 T turnstile_free
c063fbc4 T turnstile_lookup
Can someone help me out here? Am I going about it all wrong? Let me know
what other info might be needed. Thanks ~ Chris
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