DragonFlyBSD

Version String: DragonFly v3.1.0.322.gc231b-DEVELOPMENT #0: Fri Mar 16 20:31:33 CET 2012

#0 _get_mycpu () at ./machine/thread.h:69
#1 md_dumpsys (di=<optimized out>) at /usr/src/sys/platform/pc64/x86_64/dump_machdep.c:263
#2 0xffffffff802fb2d2 in dumpsys () at /usr/src/sys/kern/kern_shutdown.c:937
#3 0xffffffff802fb936 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:387
#4 0xffffffff802fbbed in panic (fmt=0xffffffff80585cf0 "assertion \"%s\" failed in %s at %s:%u") at /usr/src/sys/kern/kern_shutdown.c:843
#5 0xffffffff803036fb in bsd4_schedulerclock (lp=<optimized out>, period=<optimized out>, cpstamp=<optimized out>) at /usr/src/sys/kern/usched_bsd4.c:622
#6 0xffffffff802db16c in schedclock (info=0xffffffff820106e8, in_ipi=<optimized out>, frame=<optimized out>) at /usr/src/sys/kern/kern_clock.c:776
#7 0xffffffff802f9e03 in systimer_intr (timep=<optimized out>, in_ipi=<optimized out>, frame=0x0) at /usr/src/sys/kern/kern_systimer.c:102
#8 0xffffffff8054ad04 in lapic_timer_process_oncpu (gd=0xffffffff8200f000, frame=0x0) at /usr/src/sys/platform/pc64/apic/lapic.c:336
#9 0xffffffff8054ad3c in lapic_timer_process () at /usr/src/sys/platform/pc64/apic/lapic.c:342
#10 0xffffffff80540d69 in splz_timer () at /usr/src/sys/platform/pc64/x86_64/ipl.s:461
#11 0x0000000000000000 in ?? ()

Before dumping, several text blocks like this one were emitted:

Fatal trap 12: page fault while in kernel mode
cpuid = 0; lapic->id = 00000000
fault virtual address = 0x20
fault code = supervisor write data, page not present
instruction pointer = 0x8:0xffffffff802ec7fc
stack pointer = 0x10:0xffffffe0a8b4a980
frame pointer = 0x10:0xffffffe0a8b4a9c8
code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, long 0, def32 0, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 8139
current thread = pri 6 (CRIT)
kernel: type 12 trap, code=2

A dump is available.