DragonFly bugs List (threaded) for 2010-07
Panic: "Fatal trap 12: page fault while in kernel mode"
I have just been bitten by this panic on a 4 cores Xeon server running
It is usually lightly loaded and mainly used for mail services.
I have also setup a local chroot with a devfs mount of /dev and a nullfs
mount of /usr/pkgsrc/distfiles to build packages.
The panic occurred just after I exited a chrooted root shell.
I wasn't able to get a core dump: the keyboard was completely unresponsive
in the debugger and I had to reboot the machine with the reset switch.
Details of the crash follow:
Fatal trap 12: page fault while in kernel mode
mp_lock = 00000002; cpuid = 2; lapic.id = 04000000
fault virtual address = 0
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc02d0a55
stack pointer = 0x10:0xe30729ac
frame pointer = 0x10:0xe3072a40
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 = 89056 (zsh)
current thread = pri 6
<- SMP: XXX
kernel: type 12 trap, code=0
CPU2 stopping CPUs: 0x0000000b
Stopped at devfs_getattr+0x1b: movl 0(%edi),%edx