I started getting a panic like this immediately after bootup around the same
time as everyone else's problems (although my last build was from March 1st,
and I've only just started using INVARIANTS/WITNESS and ``makeoptions
DEBUG=-g'' which were recently aded to GENERIC).  The latest commits don't
seem to have changed anything.

During boot (interleaved with IPv6 stuff), I get this:

lock order reversal
  1st 0xc04a7380 mntvnode @ /usr/src/sys/ufs/ffs/ffs_vsops.c:1007
  2nd 0xcd105aec vnode interlock @ /usr/src/sys/ufs/ffs/ffs_vfsops.c:106

Just around the time of the console login prompt (consistently), I panic:

[warning: likely to contain hand transcription errors]

-- BEGIN ----------------------------------------------------------------------
recursed on non-recursive lock (sleep mutex) vm @ 
first acquired @ /usr/src/sys/vm/vnode_pager.c:912
panic: recurse
Stopped at      Debugger+0x44:  pushl   %ebx
db> show reg
cs                 0x8
ds          0xc0200010  getitimer+0xa0
es          0xcd0f0010
fs          0xc0460018  w_data+0x1418
ss                0x10
eax               0x12
ecx               0x20
edx         0xc00b8f00
ebx              0x202
esp         0xcd0fac1c
ebp         0xcd0fac28
esi              0x100
edi         0xc0482f1c
eip         0xc036a8dc  Debugger+0x44
Debugger+0x44:  pushl   %ebx
db> trace
Debugger(c03b9b7b) at Debugger+0x44
panic(c03bc8c8,cd0fad0c,cd0fad0c,1,0) at panic+0x70
witness_lock(c04b3960,8,c03d7bc0.1a4) at witness_lock+0x348
ffs_write(cd0facf8) at ffs_write+0xba
vnode_pager_generic_putpages(cd1196c0,cd0fadf4,1000,0,cd0fadc8) at 
vop_stdputpages(cd0fad7c,cd0fad60,c0331ab9,cd0fad7c,cd0fad9c) at vop_stdputpages+0x1a
vop_defaultop(cd0fad7c,cd0fad9c,c034f35d,cd0fad7c,0) at vop_defaultop+0x15
ufs_vnoperate(cd0fad7c) at ufs_vnoperate+0x15
vnode_pager_putpages(cd120240,cd0fadf4,1,0,cd0fadc8,c04b3960,1,c03db941,91) at 
vm_pageout_flush(cd0fadf4,1,0,c0c36404,c0466bc0) at vm_pageout_flush+0x12a
vm_object_page_clean(cd120240,0,0,4) at vm_object_page_clean+0x430
vfa_msync(c125a600,2,cb67a43c,cb67a320,0) at vfs_msync+0x235
sync(cb67a320,cd0faf80,4,bfbffdcc,bfbffdcc) at sync+0xf4
syscall(2f,2f,2f,bfbffdcc,bfbffdcc) at syscall+0x689
syscall_with_err_pushed() at syscall_with_err_pushed+0x1b
-- END ------------------------------------------------------------------------

src/sys/vm/vnode_pager.c is at revision 1.130

My kernel config file:

-- BEGIN ----------------------------------------------------------------------
machine         i386
cpu             I686_CPU
ident           DOTAR
maxusers        32

makeoptions     DEBUG=-g                #Build kernel with gdb(1) debug symbols

options         NO_F00F_HACK

options         INET                    #InterNETworking
options         INET6                   #IPv6 communications protocols
options         IPSEC                   #IP security
options         IPSEC_ESP               #IP security (crypto; define w/ IPSEC)
options         MROUTING                # Multicast routing
options         NETGRAPH                #netgraph(4) system
options         IPFIREWALL              #firewall
options         IPFIREWALL_VERBOSE      #print information about
                                        # dropped packets
options         IPFIREWALL_DEFAULT_TO_ACCEPT #allow everything by default
options         IPV6FIREWALL            #firewall for IPv6
options         IPV6FIREWALL_VERBOSE
options         IPDIVERT                #divert sockets
options         FFS                     #Berkeley Fast Filesystem
options         MFS                     #Memory Filesystem
options         MD_ROOT                 #MD is a potential root device
options         NFS                     #Network Filesystem
options         NFS_ROOT                #NFS usable as root device, NFS required
options         MSDOSFS                 #MSDOS Filesystem
options         CD9660                  #ISO 9660 Filesystem
options         PROCFS                  #Process filesystem
options         SOFTUPDATES
options         COMPAT_43               #Compatible with BSD 4.3 [KEEP THIS!]
options         SCSI_DELAY=15000        #Delay (in ms) before probing SCSI
options         AUTO_EOI_1
options         UCONSOLE                #Allow users to grab the console
options         VESA
options         USERCONFIG              #boot -c editor
options         VISUAL_USERCONFIG       #visual boot -c editor
options         KTRACE                  #ktrace(1) support
options         PERFMON
options         SYSVSHM                 #SYSV-style shared memory
options         SYSVMSG                 #SYSV-style message queues
options         SYSVSEM                 #SYSV-style semaphores
options         DDB
options         INVARIANTS
options         INVARIANT_SUPPORT
options         WITNESS

options         P1003_1B

device          isa
device          pci

device          fdc

device          ata
device          atadisk                 # ATA disk drives
options         ATA_STATIC_ID           #Static dev number like old `wd' driver
device          ahc             # AHA2940 and onboard AIC7xxx devices
device          sym             # NCR/Symbios Logic (newer chipsets + those of `ncr')

options         AHC_ALLOW_MEMIO

device          scbus           # SCSI bus (required)
device          da              # Direct Access (disks)
device          sa              # Sequential Access (tape etc)
device          cd              # CD
device          pass            # Passthrough device (direct SCSI access)

device          atkbdc  1       # At keyboard controller
device          atkbd           # at keyboard
device          psm             # psm mouse

device          vga             # VGA screen

device  splash

device          sc 1

device          npx

device          apm
device          pmtimer

device          pcm

device          midi
device          seq

device          pca

device          sio             # 8250, 16[45]50 based serial ports

device          ppc
device          ppbus           # Parallel port bus (required)
device          lpt             # Printer
device          plip            # TCP/IP over parallel
device          ppi             # Parallel port interface device

device          joy

device          miibus          # MII bus support
device          fxp             # Intel EtherExpress PRO/100B (82557, 82558)

device          random          # Entropy device
device          loop            # Network loopback
device          ether           # Ethernet support
device          disc            # Discard device
device          sl      3       # Kernel SLIP
device          ppp     3       # Kernel PPP
device          tun             # Packet tunnel.
device          gif     4       # IPv6 and IPv4 tunneling
device          faith   1       # IPv6-to-IPv4 relaying (translation)
device          stf             # 6to4 IPv6 over IPv4 encapsulation
device          pty             # Pseudo-ttys (telnet etc)
device          snp     3       # Snoop device - to look at pty/vty/etc..
device          md              # Memory "disks"
device          speaker         # Play IBM BASIC-style noises out your speaker
device          splash
device          bpf             #Berkeley packet filter

options         PPP_BSDCOMP             #PPP BSD-compress support
options         PPP_DEFLATE             #PPP zlib/deflate/gzip support
options         PPP_FILTER              #enable bpf filtering (needs bpf)

options         COMPAT_LINUX
-- END ------------------------------------------------------------------------

dmesg output from my working kernel (March 1st):

-- BEGIN ----------------------------------------------------------------------
Copyright (c) 1992-2001 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 5.0-CURRENT #1: Thu Mar  1 02:04:02 GMT 2001
Timecounter "i8254"  frequency 1193182 Hz
Timecounter "TSC"  frequency 601365847 Hz
CPU: Pentium III/Pentium III Xeon/Celeron (601.37-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x681  Stepping = 1
real memory  = 268419072 (262128K bytes)
avail memory = 256643072 (250628K bytes)
Preloaded elf kernel "kernel" at 0xc048c000.
WARNING: size of kinfo_proc (648) should be 644!!!
Pentium Pro MTRR support enabled
VESA: v2.0, 32768k memory, flags:0x1, mode table:0xc00c6974 (c0006974)
VESA: Matrox Graphics Inc.
Using $PIR table, 8 entries at 0xc00f0e70
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Intel 82443BX (440 BX) host to PCI bridge> at pcibus 0 on motherboard
pci0: <PCI bus> on pcib0
pcib1: <PCI-PCI bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci1: <display, VGA> at 0.0 (no driver attached)
isab0: <PCI-ISA bridge> at device 4.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel PIIX4 ATA33 controller> port 0xd800-0xd80f at device 4.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
pci0: <serial bus, USB> at 4.2 (no driver attached)
pci0: <bridge, PCI-unknown> at 4.3 (no driver attached)
csa0: <Crystal Semiconductor CS4614/4622/4624 Audio accelerator/4280 Audio controller> 
mem 0xdf800000-0xdf8fffff,0xe0000000-0xe0000fff irq 9 at device 9.0 on pci0
pcm0: <CS461x PCM Audio> on csa0
sym0: <896> port 0xd000-0xd0ff mem 0xde800000-0xde801fff,0xdf000000-0xdf0003ff irq 10 
at device 11.0 on pci0
sym0: Symbios NVRAM, ID 7, Fast-40, LVD, parity checking
sym0: open drain IRQ line driver, using on-chip SRAM
sym0: using LOAD/STORE-based firmware.
sym0: handling phase mismatch from SCRIPTS.
sym1: <896> port 0xb800-0xb8ff mem 0xdd800000-0xdd801fff,0xde000000-0xde0003ff irq 9 
at device 11.1 on pci0
sym1: Symbios NVRAM, ID 7, Fast-40, SE, parity checking
sym1: open drain IRQ line driver, using on-chip SRAM
sym1: using LOAD/STORE-based firmware.
sym1: handling phase mismatch from SCRIPTS.
pci0: <network, ethernet> at 13.0 (no driver attached)
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: model Generic PS/2 mouse, device ID 0
fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
joy0 at port 0x201 on isa0
pca0 at port 0x40 on isa0
pmtimer0 on isa0
ppc0: <Parallel port> at port 0x378-0x37f irq 7 flags 0x40 on isa0
ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode
ppc0: FIFO with 16/16/9 bytes threshold
ppi0: <Parallel I/O> on ppbus0
plip0: <PLIP network interface> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
sc0: <System console> on isa0
sc0: VGA <16 virtual consoles, flags=0x200>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
sio2 at port 0x3e8-0x3ef irq 5 on isa0
sio2: type 16550A
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
sc1: <System console> on isa0
sc1: MDA <16 virtual consoles, flags=0x0>
WARNING: Driver mistake: repeat make_dev("consolectl")
vga1: <Generic ISA VGA> at port 0x3b0-0x3bb iomem 0xb0000-0xb7fff on isa0
unknown: <PNP0401> can't assign resources
unknown: <PNP0501> can't assign resources
unknown: <PNP0501> can't assign resources
unknown: <PNP0700> can't assign resources
unknown: <PNP0f13> can't assign resources
unknown: <PNP0303> can't assign resources
pca1: <AT-style speaker sound> at port 0x61 on isa0
WARNING: Driver mistake: repeat make_dev("pcaudio")
WARNING: Driver mistake: repeat make_dev("pcaudioctl")
IPv6 packet filtering initialized, default to accept, unlimited logging
IP packet filtering initialized, divert enabled, rule-based forwarding disabled, 
default to accept, unlimited logging
IPsec: Initialized Security Association Processing.
ad0: 73308MB <IBM-DTLA-307075> [148945/16/63] at ata0-master UDMA33
Waiting 15 seconds for SCSI devices to settle
(noperiph:sym0:0:-1:-1): SCSI BUS reset delivered.
(noperiph:sym1:0:-1:-1): SCSI BUS reset delivered.
sa0 at sym1 bus 0 target 4 lun 0
sa0: <WANGTEK 5525ES SCSI M74H 11> Removable Sequential Access SCSI-CCS device 
sa0: 3.300MB/s transfers
Mounting root from ufs:/dev/da0a
da0 at sym0 bus 0 target 0 lun 0
da0: <IBM DMVS18V 0250> Fixed Direct Access SCSI-3 device 
da0: 80.000MB/s transfers (40.000MHz, offset 31, 16bit), Tagged Queueing Enabled
da0: 17501MB (35843670 512 byte sectors: 255H 63S/T 2231C)
da1 at sym0 bus 0 target 1 lun 0
da1: <IBM DMVS18V 0250> Fixed Direct Access SCSI-3 device 
da1: 80.000MB/s transfers (40.000MHz, offset 31, 16bit), Tagged Queueing Enabled
da1: 17501MB (35843670 512 byte sectors: 255H 63S/T 2231C)
cd0 at sym1 bus 0 target 2 lun 0
cd0: <  > Fixed CD-ROM SCSI-0 device 
cd0: 3.300MB/s transfers
cd0: Attempt to query device size failed: HARDWARE FAILURE, Ram failure
cd1 at sym1 bus 0 target 3 lun 0
cd1: <PLEXTOR CD-R   PX-W124TS 1.02> Removable CD-ROM SCSI-2 device 
cd1: 20.000MB/s transfers (20.000MHz, offset 8)
cd1: Attempt to query device size failed: NOT READY, Medium not present - tray closed
da2 at sym1 bus 0 target 0 lun 0
da2: <iomega jaz 1GB H.72> Removable Direct Access SCSI-2 device 
da2: 10.000MB/s transfers (10.000MHz, offset 15)
da2: Attempt to query device size failed: NOT READY, Medium not present
-- END ------------------------------------------------------------------------

What changes should I start to make first to narrow this down?  (I'll try to
get kernel dumps going, though I haven't had much success with these in the



Mark Valentine, Thuvia Labs <[EMAIL PROTECTED]>       <http://www.thuvia.co.uk>
"Tigers will do ANYTHING for a tuna fish sandwich."       Mark Valentine uses
"We're kind of stupid that way."   *munch* *munch*        and endorses FreeBSD
  -- <http://www.calvinandhobbes.com>                  <http://www.freebsd.org>

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