Iain Dooley wrote:
hi all,

uname -a
FreeBSD HOSTNAME 6.2-RELEASE FreeBSD 6.2-RELEASE #0: Fri Jan 12 11:05:30 UTC 2007 [EMAIL PROTECTED]:/usr/obj/usr/src/sys/SMP i386

running on dual quad core intel xeons with 4gb ram.

my server has been rebooting quite a bit and stopped responding today. i found this on the console:

Fatal trap: 12 page fault while in kernel mode
cpuid = 5; apic id = 05
fault virtual address = 0x0
fault code = supervisor write, page not present
instruction pointer = 0x20:0xc0880472
stack pointer = 0x28:0xe6ea9c8c
code segment = base 0x0, limit 0xfffff, type 0x1b
             = DPL 0, pres 1, def32 1, gran 1
processor eflags = resume, IOPL = 0
current process = 12 (idle: cpu5)
trap number = 12
panic: page fault
cpuid = 5
uptime 24m41s
cannot dump. no dump device specified

i've configured the dump device and will follow the kernel debugging details in the handbook if it happens again but i thought i'd write in now in case the cause of the problem jumped out at anyone.

i've run mprime for 24 hours, and memtest for 3 passes, and a script i wrote which just exhausts ram and CPU, then backs off and does it again which have been running for 24 hours.

i've also just started running this:


i noticed that the same "fatal trap 12" appeared during stress tests as listed here:


any help, guidance or information would be much appreciated.

What you have so far is close to meaningless. The "fault virtual address = 0x0" means little more than "somewhere in the kernel there was a null pointer dereference". The fact that it was the idle process is suspicious though, it suggests that hardware failure is a high probability. Please follow up with the backtrace if you want to pursue this further.


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