Dumping 383 MB (3 chunks)
  chunk 0: 1MB (159 pages)

Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 01
fault virtual address   = 0x1c
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc05e3973
stack pointer           = 0x28:0xd107dcbc
frame pointer           = 0x28:0xd107dce8
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         = 37 (swi4: clock sio)
trap number             = 12
 ... ok
  chunk 1: 382MB (97776 pages) 366 350 334 318 302 286 270 254 238 222 206 190 174 158 142 126 110 94 78 62 46 30 14 ... ok
  chunk 2: 1MB (256 pages)

#0  doadump () at pcpu.h:165
165     pcpu.h: No such file or directory.
        in pcpu.h
(kgdb) backtrace full
#0  doadump () at pcpu.h:165
No locals.
#1  0xc05d81c6 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:399
        first_buf_printf = 1
#2  0xc05d85a7 in panic (fmt=0xc07c0107 "%s")
    at /usr/src/sys/kern/kern_shutdown.c:555
        bootopt = 260
        newpanic = 0
        buf = "page fault", '\0' <repeats 245 times>
#3  0xc078266a in trap_fatal (frame=0xd026174c, eva=3279761408)
    at /usr/src/sys/i386/i386/trap.c:836
        code = 40
        type = 12
        ss = 40
        esp = 0
        softseg = {ssd_base = 0, ssd_limit = 1048575, ssd_type = 27,
  ssd_dpl = 0, ssd_p = 1, ssd_xx = 0, ssd_xx1 = 0, ssd_def32 = 1, ssd_gran = 1}
        msg = 0x0
#4  0xc0782834 in trap_pfault (frame=0xd026174c, usermode=0, eva=3279761408)
    at /usr/src/sys/i386/i386/trap.c:744
        va = 3279761408
        vm = (struct vmspace *) 0x0
        map = 0xc1060000
---Type <return> to continue, or q <return> to quit---
        rv = 1
        ftype = 1 '\001'
        p = (struct proc *) 0xc2ab5c48
#5  0xc0782ade in trap (frame=
      {tf_fs = 8, tf_es = 40, tf_ds = 40, tf_edi = -1015205888, tf_esi = -1028052704, tf_ebp = -802809704, tf_isp = -802809992, tf_ebx = 1, tf_edx = -1017594422, tf_ecx = -1015211906, tf_eax = -1015211714, tf_trapno = 12, tf_err = 0, tf_eip = -1017616506, tf_cs = 32, tf_eflags = 66199, tf_esp = -1015211906, tf_ss = -1015222986}) at /usr/src/sys/i386/i386/trap.c:434
        p = (struct proc *) 0xc2ab5c48
        sticks = 3266914592
        i = 0
        ucode = 0
        type = 12
        code = 0
        eva = 3279761408
#6  0xc0771f3a in calltrap () at /usr/src/sys/i386/i386/exception.s:139
No locals.
#7  0xc3586786 in ?? ()
No symbol table info available.
Previous frame inner to this frame (corrupt stack?)
(kgdb)