GENERIC HEAD from Oct 5 06:58 UTC + Tor's snapshot.diff4, vmcore.461

GDB: no debug ports present
KDB: debugger backends: ddb
KDB: current backend: ddb
Copyright (c) 1992-2005 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 7.0-CURRENT #1: Wed Oct  5 11:55:23 CEST 2005
    pho@current.osted.lan:/usr/src/sys/i386/compile/PHO
WARNING: WITNESS option enabled, expect reduced performance.
ACPI APIC Table: <A M I  OEMAPIC >
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Celeron(R) CPU 1.80GHz (1799.15-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0xf13  Stepping = 3
  Features=0x3febfbff<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>
real memory  = 267583488 (255 MB)
avail memory = 251998208 (240 MB)
:
Trying to mount root from ufs:/dev/ad0s1a
rl0: link state changed to DOWN
Limiting icmp unreach response from 5274 to 200 packets/sec
Limiting icmp unreach response from 9911 to 200 packets/sec
Limiting icmp unreach response from 7483 to 200 packets/sec
:
Limiting icmp unreach response from 15217 to 200 packets/sec
Limiting icmp unreach response from 12222 to 200 packets/sec
panic: mutex Giant not owned at ../../../dev/md/md.c:480
cpuid = 0
KDB: enter: panic
[thread pid 2836 tid 100233 ]
Stopped at      kdb_enter+0x2b: nop
db> where
Tracing pid 2836 tid 100233 td 0xc3084300
kdb_enter(c08650f1) at kdb_enter+0x2b
panic(c086463f,c0878b74,c084a33e,1e0,c1bce318) at panic+0x14b
_mtx_assert(c0962760,1,c084a33e,1e0,c0868b34) at _mtx_assert+0x67
mdstart_vnode(c1f2e000,c1bce318,c1f2e020,0,c054e71c) at mdstart_vnode+0x25
md_kthread(c1f2e000,cf5b8d38,c1f2e000,c054e71c,0) at md_kthread+0x16c
fork_exit(c054e71c,c1f2e000,cf5b8d38) at fork_exit+0xa0
fork_trampoline() at fork_trampoline+0x8
--- trap 0x1, eip = 0, esp = 0xcf5b8d6c, ebp = 0 ---
db> ps
  pid   proc     uid  ppid  pgrp  flag   stat  wmesg    wchan  cmd
 2836 c3086418    0     0     0 0000204 [CPU 0] md1
 2835 c2660830    0  2831  2831 0004002 [SLPQ g_waitidle 0xc092c380][SLP] mdconfig
 2831 c265e624    0   970  2831 0004002 [SLPQ wait 0xc265e624][SLP] sh
 2727 c1cc0000 1001  2630   838 0000002 [RUNQ] mkdir
 2682 c1c38830 1001  2630   838 0000002 [RUNQ] mkdir
 2630 c1c3c20c 1001  2629   838 0000002 [SLPQ wait 0xc1c3c20c][SLP] mkdir
 2629 c1c57418 1001   842   838 0004002 [SLPQ wait 0xc1c57418][SLP] mkdir
  970 c265ec48    0   967   970 0004002 [SLPQ wait 0xc265ec48][SLP] bash
  967 c2660418    0   966   967 0004002 [SLPQ pause 0xc266044c][SLP] csh
  966 c1cbb418 1001   950   966 0004102 [SLPQ wait 0xc1cbb418][SLP] su
  965 c1cbb000 1001   959   965 0004002 [SLPQ select 0xc09b0324][SLP] top
  959 c1cbba3c 1001   958   959 0004002 [SLPQ wait 0xc1cbba3c][SLP] bash
  958 c1cbb20c 1001   956   956 0000100 [SLPQ select 0xc09b0324][SLP] sshd
  956 c1c9dc48    0   428   956 0004100 [SLPQ sbwait 0xc1b39bc8][SLP] sshd
  950 c1cbb624 1001   949   950 0004002 [SLPQ wait 0xc1cbb624][SLP] bash
  949 c1cbb830 1001   947   947 0000100 [SLPQ select 0xc09b0324][SLP] sshd
  947 c1cbbc48    0   428   947 0004100 [SLPQ sbwait 0xc1b390a8][SLP] sshd
  842 c18b1830 1001   841   838 0000002 [SLPQ wait 0xc18b1830][SLP] run
  841 c18b120c 1001   840   838 0000002 [SLPQ wait 0xc18b120c][SLP] run
  840 c165b418 1001   838   838 0004002 [SLPQ nanslp 0xc096300c][SLP] run
  838 c18b1000 1001   829   838 0004002 [SLPQ wait 0xc18b1000][SLP] sh
  829 c18b1418 1001   828   829 0004002 [SLPQ wait 0xc18b1418][SLP] bash
  828 c18aec48 1001   826   826 0000100 [SLPQ select 0xc09b0324][SLP] sshd
  826 c18ae624    0   428   826 0004100 [SLPQ sbwait 0xc1898bc8][SLP] sshd
  550 c18aea3c    0     1   550 0004002 [SLPQ ttyin 0xc16f9010][SLP] getty
  549 c18ae830    0     1   549 0004002 [SLPQ ttyin 0xc16f9410][SLP] getty
  548 c17cb418    0     1   548 0004002 [SLPQ ttyin 0xc16f0810][SLP] getty
  547 c18b1c48    0     1   547 0004002 [SLPQ ttyin 0xc16ef810][SLP] getty
  546 c18ae418    0     1   546 0004002 [SLPQ ttyin 0xc16f0c10][SLP] getty
  545 c18b1624    0     1   545 0004002 [SLPQ ttyin 0xc16eec10][SLP] getty
  544 c18b2000    0     1   544 0004002 [SLPQ ttyin 0xc16ee810][SLP] getty
  543 c17c7830    0     1   543 0004002 [SLPQ ttyin 0xc16e7410][SLP] getty
  529 c18ae20c    0     1   529 0000000 [SLPQ select 0xc09b0324][SLP] inetd
  450 c18ae000    0     1   450 0000000 [SLPQ nanslp 0xc096300c][SLP] cron
  438 c18b1a3c   25     1   438 0000100 [SLPQ pause 0xc18b1a70][SLP] sendmail
  434 c17c7a3c    0     1   434 0000100 [SLPQ select 0xc09b0324][SLP] sendmail
  428 c17cb20c    0     1   428 0000100 [SLPQ select 0xc09b0324][SLP] sshd
  410 c17c7624    0     1   410 0000000 [SLPQ select 0xc09b0324][SLP] ntpd
  379 c17cba3c    0     1   379 0000000 [SLPQ select 0xc09b0324][SLP] usbd
  360 c17cbc48    0   354   354 0000000 [SLPQ - 0xc1796a00][SLP] nfsd
  359 c17cb624    0   354   354 0000000 [SLPQ - 0xc1796c00][SLP] nfsd
  357 c17c7000    0   354   354 0000000 [SLPQ - 0xc1820000][SLP] nfsd
  356 c17cb000    0   354   354 0000000 [SLPQ - 0xc1796e00][SLP] nfsd
  354 c17c7418    0     1   354 0000000 [SLPQ select 0xc09b0324][SLP] nfsd
  352 c17c720c    0     1   352 0000000 [SLPQ select 0xc09b0324][SLP] mountd
  283 c17c7c48    0     1   283 0000000 [SLPQ select 0xc09b0324][SLP] rpcbind
  255 c17cb830    0     1   255 0000000 [SLPQ select 0xc09b0324][SLP] devd
  228 c165b20c    0     1   228 0000000 [SLPQ select 0xc09b0324][SLP] syslogd
   61 c165b624    0     0     0 0000204 [SLPQ - 0xcca21d04][SLP] schedcpu
   60 c165b830    0     0     0 0000204 [SLPQ - 0xc09b89ac][SLP] nfsiod 3
   59 c165ba3c    0     0     0 0000204 [SLPQ - 0xc09b89a8][SLP] nfsiod 2
   58 c165bc48    0     0     0 0000204 [SLPQ - 0xc09b89a4][SLP] nfsiod 1
   57 c1771000    0     0     0 0000204 [SLPQ - 0xc09b89a0][SLP] nfsiod 0
   56 c177120c    0     0     0 0000204 [RUNQ] syncer
   55 c1771418    0     0     0 0000204 [SLPQ vlruwt 0xc1771418][SLP] vnlru
   54 c1771624    0     0     0 0000204 [RUNQ] bufdaemon
   53 c1771830    0     0     0 000020c [SLPQ pgzero 0xc09befa4][SLP] pagezero
   52 c1771a3c    0     0     0 0000204 [SLPQ psleep 0xc09beaf4][SLP] vmdaemon
   51 c1771c48    0     0     0 0000204 [SLPQ psleep 0xc09beab0][SLP] pagedaemon
   50 c15ac624    0     0     0 0000204 [SLPQ - 0xc16a083c][SLP] fdc0
   49 c15ac830    0     0     0 0000204 [IWAIT] swi0: sio
   48 c15aca3c    0     0     0 0000204 [SLPQ usbevt 0xc1645210][SLP] usb4
   47 c15acc48    0     0     0 0000204 [SLPQ usbevt 0xc1695210][SLP] usb3
   46 c165a000    0     0     0 0000204 [SLPQ usbevt 0xc1696210][SLP] usb2
   45 c165a20c    0     0     0 0000204 [SLPQ usbevt 0xc1682210][SLP] usb1
   44 c165a418    0     0     0 0000204 [SLPQ usbtsk 0xc092bcc4][SLP] usbtask
   43 c165a624    0     0     0 0000204 [SLPQ usbevt 0xc164e210][SLP] usb0
   42 c165a830    0     0     0 0000204 [IWAIT] swi2: cambio
   41 c165aa3c    0     0     0 0000204 [IWAIT] swi5:+
    9 c165ac48    0     0     0 0000204 [SLPQ - 0xc15cba00][SLP] acpi_task2
    8 c165b000    0     0     0 0000204 [SLPQ - 0xc15cba00][SLP] acpi_task1
    7 c159cc48    0     0     0 0000204 [SLPQ - 0xc15cba00][SLP] acpi_task0
    6 c15aa000    0     0     0 0000204 [SLPQ - 0xc15cba80][SLP] thread taskq
   40 c15aa20c    0     0     0 0000204 [IWAIT] swi6:+
   39 c15aa418    0     0     0 0000204 [IWAIT] swi6: task queue
    5 c15aa624    0     0     0 0000204 [SLPQ - 0xc15cbd80][SLP] kqueue taskq
   38 c15aa830    0     0     0 0000204 [SLPQ - 0xc09299e0][SLP] yarrow
    4 c15aaa3c    0     0     0 0000204 [SLPQ - 0xc092c508][SLP] g_down
    3 c15aac48    0     0     0 0000204 [SLPQ - 0xc092c504][SLP] g_up
    2 c15ac000    0     0     0 0000204 [SLPQ gread 0xc1bce318][SLP] g_event
   37 c15ac20c    0     0     0 0000204 [IWAIT] swi1: net
   36 c15ac418    0     0     0 0000204 [IWAIT] swi3: vm
   35 c1588624    0     0     0 000020c [RUNQ] swi4: clock sio
   34 c1588830    0     0     0 0000204 [IWAIT] irq23: ehci0
   33 c1588a3c    0     0     0 0000204 [RUNQ] irq22: rl0
   32 c1588c48    0     0     0 0000204 [IWAIT] irq21:
   31 c159c000    0     0     0 0000204 [IWAIT] irq20:
   30 c159c20c    0     0     0 0000204 [IWAIT] irq19: uhci1
   29 c159c418    0     0     0 0000204 [IWAIT] irq18: uhci2
   28 c159c624    0     0     0 0000204 [IWAIT] irq17: pcm0
   27 c159c830    0     0     0 0000204 [IWAIT] irq16: uhci0 uhci3
   26 c159ca3c    0     0     0 0000204 [IWAIT] irq15: ata1
   25 c155e20c    0     0     0 0000204 [RUNQ] irq14: ata0
   24 c155e418    0     0     0 0000204 [IWAIT] irq13:
   23 c155e624    0     0     0 0000204 [IWAIT] irq12:
   22 c155e830    0     0     0 0000204 [IWAIT] irq11:
   21 c155ea3c    0     0     0 0000204 [IWAIT] irq10:
   20 c155ec48    0     0     0 0000204 [IWAIT] irq9: acpi0
   19 c1588000    0     0     0 0000204 [IWAIT] irq8:
   18 c158820c    0     0     0 0000204 [IWAIT] irq7: ppc0
   17 c1588418    0     0     0 0000204 [IWAIT] irq6: fdc0
   16 c1559000    0     0     0 0000204 [IWAIT] irq5:
   15 c155920c    0     0     0 0000204 [IWAIT] irq4: sio0
   14 c1559418    0     0     0 0000204 [IWAIT] irq3:
   13 c1559624    0     0     0 0000204 [IWAIT] irq0:
   12 c1559830    0     0     0 0000204 [IWAIT] irq1: atkbd0
   11 c1559a3c    0     0     0 000020c [Can run] idle: cpu0
    1 c1559c48    0     0     1 0004200 [SLPQ wait 0xc1559c48][SLP] init
   10 c155e000    0     0     0 0000204 [SLPQ ktrace 0xc0960f98][SLP] ktrace
    0 c092c600    0     0     0 0000200 [IWAIT] swapper
 2722 c1c9720c 1001  2630   838 0002002 [RUNQ] mkdir
 2712 c1bdea3c 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2701 c1c18a3c 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2720 c1c57c48 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2715 c1c1820c 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2736 c265e418 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2713 c1bdec48 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2726 c1c7d830 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2686 c1c5dc48 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2737 c1cbd624 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2721 c1c97c48 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2684 c1c1c418 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2716 c1c18624 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2741 c1cc0418 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2733 c265ea3c 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2739 c265e20c 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2738 c1cc0830 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2685 c1cbd418 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2731 c1c1c000 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2728 c1cbdc48 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2744 c3086624 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2683 c1c38a3c 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2703 c1cbd20c 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2729 c1cbda3c 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2743 c3086830 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2735 c1c1c624 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2711 c1bde830 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2690 c1c5d624 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2719 c1c57a3c 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2734 c265e000 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2704 c1c5720c 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2732 c1cc020c 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2730 c1cc0c48 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2688 c1c5d418 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2689 c1c9d000 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2700 c1bde624 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2742 c1cc0624 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2702 c265e830 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2691 c1c9d624 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2718 c1c18418 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2706 c1bdd418 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2707 c1c5a000 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2697 c1c38c48 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2695 c1c9da3c 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2692 c1c18830 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2714 c1c18000 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2740 c1cc0a3c 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2725 c1c7da3c 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2710 c1c5a20c 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2698 c1c3c830 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2708 c1bdda3c 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2694 c1c9d830 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2724 c1c7dc48 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2723 c1c97000 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2717 c1c1ca3c 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2709 c1c97418 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2705 c1c1c830 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2699 c1c3cc48 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2696 c1c3c000 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2693 c1c5d20c 1001  2630   838 0002002 zomb[INACTIVE] mkdir
 2687 c1c1c20c 1001  2630   838 0002002 zomb[INACTIVE] mkdir
db>  show lockedvnods
Locked vnodes

0xc2312570: tag ufs, type VDIR
    usecount 0, writecount 0, refcount 2 mountedhere 0
    flags ()
     lock type ufs: EXCL (count 1) by thread 0xc1c3b480 (pid 2682)#0 0xc062bb5d at lockmgr+0x4ed
#1 0xc06831ad at vop_stdlock+0x21
#2 0xc080be93 at VOP_LOCK_APV+0x87
#3 0xc077a34c at ffs_lock+0x10
#4 0xc080be93 at VOP_LOCK_APV+0x87
#5 0xc0696f5c at vn_lock+0xac
#6 0xc068b45a at vrele+0xd2
#7 0xc068eda6 at kern_chdir+0x162
#8 0xc068ec42 at chdir+0x12
#9 0xc07fa0eb at syscall+0x22f
#10 0xc07e736f at Xint0x80_syscall+0x1f

        ino 49112, on dev ad0s1e

0xc233aae0: tag ufs, type VDIR
    usecount 0, writecount 0, refcount 2 mountedhere 0
    flags ()
     lock type ufs: EXCL (count 1) by thread 0xc1c99c00 (pid 2727)#0 0xc062bb5d at lockmgr+0x4ed
#1 0xc06831ad at vop_stdlock+0x21
#2 0xc080be93 at VOP_LOCK_APV+0x87
#3 0xc077a34c at ffs_lock+0x10
#4 0xc080be93 at VOP_LOCK_APV+0x87
#5 0xc0696f5c at vn_lock+0xac
#6 0xc068b45a at vrele+0xd2
#7 0xc068eda6 at kern_chdir+0x162
#8 0xc068ec42 at chdir+0x12
#9 0xc07fa0eb at syscall+0x22f
#10 0xc07e736f at Xint0x80_syscall+0x1f

        ino 118388, on dev ad0s1e

0xc24b815c: tag ufs, type VDIR
    usecount 0, writecount 0, refcount 1 mountedhere 0
    flags ()
     lock type ufs: EXCL (count 1) by thread 0xc165c780 (pid 54)#0 0xc062bb5d at lockmgr+0x4ed
#1 0xc06831ad at vop_stdlock+0x21
#2 0xc080be93 at VOP_LOCK_APV+0x87
#3 0xc077a34c at ffs_lock+0x10
#4 0xc080be93 at VOP_LOCK_APV+0x87
#5 0xc0696f5c at vn_lock+0xac
#6 0xc067d877 at flushbufqueues+0x37b
#7 0xc067d44b at buf_daemon+0xa3
#8 0xc06230c4 at fork_exit+0xa0
#9 0xc07e737c at fork_trampoline+0x8

        ino 48840, on dev ad0s1e
db> show lockedbufs
buf at 0xc6609eb4
b_flags = 0xa00200a0<remfree,vmio,clusterok,delwri,cache>
b_error = 0, b_bufsize = 16384, b_bcount = 16384, b_resid = 0
b_bufobj = (0xc17f4ea4), b_data = 0xc6c97000, b_blkno = 753920
b_npages = 4, pages(OBJ, IDX, PA): (0xc1066108, 0x17020, 0xac84000),(0xc1066108, 0x17021, 0xaf65000),(0xc1066108, 0x17022, 0xb0e6000),(0xc1066108, 0x17023, 0xb447000)
 lock type getblk: EXCL (count 1) by thread 0xc1c3b480 (pid 2682)#0 0xc062bb5d at lockmgr+0x4ed
#1 0xc067dfa7 at getblk+0x15b
#2 0xc067b017 at breadn+0x5b
#3 0xc067afb8 at bread+0x20
#4 0xc076694c at ffs_update+0x228
#5 0xc077f0b4 at ufs_inactive+0x184
#6 0xc080bc8f at VOP_INACTIVE_APV+0x9b
#7 0xc068b801 at vinactive+0x8d
#8 0xc068b480 at vrele+0xf8
#9 0xc068eda6 at kern_chdir+0x162
#10 0xc068ec42 at chdir+0x12
#11 0xc07fa0eb at syscall+0x22f
#12 0xc07e736f at Xint0x80_syscall+0x1f

buf at 0xc6629164
b_flags = 0x80000024<remfree,cache,async>
b_error = 0, b_bufsize = 4096, b_bcount = 2048, b_resid = 0
b_bufobj = (0xc2134d48), b_data = 0xc7187000, b_blkno = 422776
b_npages = 1, pages(OBJ, IDX, PA): (0xc09be8e0, 0x7288, 0x7e28000)
db> show alllocks
db> call doadump
Dumping 254 MB (2 chunks)
  chunk 0: 1MB (159 pages) ... ok
  chunk 1: 255MB (65072 pages) 239 223 207 191 175 159 143 127 111 95 79 63 47 31 15 ... ok

Dump complete
= 0xf
db> res

(kgdb) bt
#0  doadump () at pcpu.h:165
#1  0xc04698d3 in db_fncall (dummy1=0xc09dc500, dummy2=0x0, dummy3=0x0, dummy4=0xcf5b8aa0 "\212[8}\212[ϼ\212[\220\a")
    at ../../../ddb/db_command.c:488
#2  0xc04696d8 in db_command (last_cmdp=0xc0915564, cmd_table=0x0, aux_cmd_tablep=0xc089157c, aux_cmd_tablep_end=0xc0891598)
    at ../../../ddb/db_command.c:403
#3  0xc04697a0 in db_command_loop () at ../../../ddb/db_command.c:454
#4  0xc046b3bd in db_trap (type=0x3, code=0x0) at ../../../ddb/db_main.c:228
#5  0xc064e84c in kdb_trap (type=0x3, code=0x0, tf=0xcf5b8be4) at ../../../kern/subr_kdb.c:473
#6  0xc07f9900 in trap (frame=
      {tf_fs = 0xcf5b0008, tf_es = 0xc0650028, tf_ds = 0xc0860028, tf_edi = 0xc086463f, tf_esi = 0x1, tf_ebp = 0xcf5b8c24, tf_isp = 0xcf5b8c10, tf_ebx = 0xcf5b8c50, tf_edx = 0x0, tf_ecx = 0xc1033000, tf_eax = 0x12, tf_trapno = 0x3, tf_err = 0x0, tf_eip = 0xc064e5b3, tf_cs = 0x20, tf_eflags = 0x296, tf_esp = 0xcf5b8c44, tf_ss = 0xc06367eb}) at ../../../i386/i386/trap.c:591
#7  0xc07e731a in calltrap () at ../../../i386/i386/exception.s:139
#8  0xcf5b0008 in ?? ()
#9  0xc0650028 in log (level=0x0, fmt=---Can't read userspace from dump, or kernel process---

) at ../../../kern/subr_prf.c:238
#10 0xc06367eb in panic (fmt=0xc086463f "mutex %s not owned at %s:%d") at ../../../kern/kern_shutdown.c:549
#11 0xc062ef7f in _mtx_assert (m=0xc0962760, what=0x0, file=0xc084a33e "../../../dev/md/md.c", line=0x1e0) at ../../../kern/kern_mutex.c:742
#12 0xc054e0e9 in mdstart_vnode (sc=0xc1f2e000, bp=0xc1bce318) at ../../../dev/md/md.c:480
#13 0xc054e888 in md_kthread (arg=0xc1f2e000) at ../../../dev/md/md.c:676
#14 0xc06230c4 in fork_exit (callout=0xc054e71c <md_kthread>, arg=0xc1f2e000, frame=0xcf5b8d38) at ../../../kern/kern_fork.c:789
#15 0xc07e737c in fork_trampoline () at ../../../i386/i386/exception.s:208
(kgdb) f 12
#12 0xc054e0e9 in mdstart_vnode (sc=0xc1f2e000, bp=0xc1bce318) at ../../../dev/md/md.c:480
480             mtx_assert(&Giant, MA_OWNED);
(kgdb) l
475             int error;
476             struct uio auio;
477             struct iovec aiov;
478             struct mount *mp;
479
480             mtx_assert(&Giant, MA_OWNED);
481             /*
482              * VNODE I/O
483              *
484              * If an error occurs, we set BIO_ERROR but we do not set