GDB: no debug ports present
KDB: debugger backends: ddb
KDB: current backend: ddb
63700992K of memory above 4GB ignored
Copyright (c) 1992-2013 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
        The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 10.0-CURRENT #0 r254222: Sun Aug 11 21:42:54 UTC 2013
    root@snap.freebsd.org:/usr/obj/usr/src/sys/GENERIC i386
FreeBSD clang version 3.3 (tags/RELEASE_33/final 183502) 20130610
WARNING: WITNESS option enabled, expect reduced performance.
CPU: Intel(R) Xeon(R) CPU E5-2630 0 @ 2.30GHz (2300.05-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x206d7  Family = 0x6  Model = 0x2d  Stepping = 7
  Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  Features2=0x17bee3ff<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,DCA,SSE4.1,SSE4.2,x2APIC,POPCNT,TSCDLT,AESNI,XSAVE,AVX>
  AMD Features=0x2c100000<NX,Page1GB,RDTSCP,LM>
  AMD Features2=0x1<LAHF>
  TSC: P-state invariant, performance statistics
real memory  = 68719476736 (65536 MB)
avail memory = 2085470208 (1988 MB)
Event timer "LAPIC" quality 600
ACPI APIC Table: <DELL   PE_SC3  >
FreeBSD/SMP: Multiprocessor System Detected: 24 CPUs
FreeBSD/SMP: 2 package(s) x 6 core(s) x 2 SMT threads
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  1
 cpu2 (AP): APIC ID:  2
 cpu3 (AP): APIC ID:  3
 cpu4 (AP): APIC ID:  4
 cpu5 (AP): APIC ID:  5
 cpu6 (AP): APIC ID:  6
 cpu7 (AP): APIC ID:  7
 cpu8 (AP): APIC ID:  8
 cpu9 (AP): APIC ID:  9
 cpu10 (AP): APIC ID: 10
 cpu11 (AP): APIC ID: 11
 cpu12 (AP): APIC ID: 32
 cpu13 (AP): APIC ID: 33
 cpu14 (AP): APIC ID: 34
 cpu15 (AP): APIC ID: 35
 cpu16 (AP): APIC ID: 36
 cpu17 (AP): APIC ID: 37
 cpu18 (AP): APIC ID: 38
 cpu19 (AP): APIC ID: 39
 cpu20 (AP): APIC ID: 40
 cpu21 (AP): APIC ID: 41
 cpu22 (AP): APIC ID: 42
 cpu23 (AP): APIC ID: 43
kernel trap 12 with interrupts disabled
panic: vm_fault: fault on nofault entry, addr: c9f7c000
cpuid = 0
KDB: stack backtrace:
db_trace_self_wrapper(c116f104,23f0,c12e667c,fffc3025,a,...) at db_trace_self_wrapper+0x2d/frame 0xc18208a8
kdb_backtrace(c11c3ac3,0,c11a694c,c1820964,c1be0000,...) at kdb_backtrace+0x30/frame 0xc1820910
vpanic(c1820964,c1820ab8,c0d4c61e,c11a694c,c9f7c000,...) at vpanic+0x11f/frame 0xc182094c
panic(c11a694c,c9f7c000,2,c1820a7c,c1820a6c,...) at panic+0x12/frame 0xc1820958
vm_fault_hold(c1be0000,c9f7c000,2,0,0,...) at vm_fault_hold+0x19fe/frame 0xc1820ab8
vm_fault(c1be0000,c9f7c000,2,0,a,...) at vm_fault+0x82/frame 0xc1820ae0
trap_pfault(c9f7cbf7,c,c12730d8,c14b8c74,46,...) at trap_pfault+0x223/frame 0xc1820b58
trap(c1820ca8) at trap+0x574/frame 0xc1820c9c
calltrap() at calltrap+0x6/frame 0xc1820c9c
--- trap 0xc, eip = 0xc1820d37, esp = 0xc1820ce8, ebp = 0 ---
end() at 0xc1820d37
KDB: enter: panic
[ thread pid 0 tid 0 ]
Stopped at      kdb_enter+0x3d: movl    $0,kdb_why
db> bt
Tracing pid 0 tid 0 td 0xc14b8bc0
kdb_enter(c116ac97,c116ac97,c11a694c,c1820964,c1be0000,...) at kdb_enter+0x3d/frame 0xc1820910
vpanic(c1820964,c1820ab8,c0d4c61e,c11a694c,c9f7c000,...) at vpanic+0x143/frame 0xc182094c
panic(c11a694c,c9f7c000,2,c1820a7c,c1820a6c,...) at panic+0x12/frame 0xc1820958
vm_fault_hold(c1be0000,c9f7c000,2,0,0,...) at vm_fault_hold+0x19fe/frame 0xc1820ab8
vm_fault(c1be0000,c9f7c000,2,0,a,...) at vm_fault+0x82/frame 0xc1820ae0
trap_pfault(c9f7cbf7,c,c12730d8,c14b8c74,46,...) at trap_pfault+0x223/frame 0xc1820b58
trap(c1820ca8) at trap+0x574/frame 0xc1820c9c
calltrap() at calltrap+0x6/frame 0xc1820c9c
--- trap 0xc, eip = 0xc1820d37, esp = 0xc1820ce8, ebp = 0 ---
end() at 0xc1820d37
db> whe