7.0-CURRENT em0 related panic

[Goran Gajic]

>From today built:

db> bt
Tracing pid 12 tid 100004 td 0xc2d728c0
m_tag_delete_chain(c3893400,0) at m_tag_delete_chain+0x2c
mb_dtor_mbuf(c3893400,100,0) at mb_dtor_mbuf+0x18
uma_zfree_arg(c1463960,c3893400,0) at uma_zfree_arg+0x24
mb_free_ext(c3893400) at mb_free_ext+0x1ec
m_freem(c38c1c00,c2e63000,c2eed400,c2ed6300,d3d28c70,...) at m_freem+0x1a
em_setup_transmit_structures(c2e63000,c2e63000,c2eed400,1,d3d28c80,...) at 
em_setup_transmit_structures+0x8c
em_init_locked(c2e63000,c2e63000,d3d28c98,c053bd3c,c2e63000,...) at 
em_init_locked+0x152
em_watchdog(c2e63000,c2e63000,c2e631d8,6,d3d28ccc,...) at em_watchdog+0x97
em_local_timer(c2e63000) at em_local_timer+0x64
softclock(0) at softclock+0x232
ithread_execute_handlers(c2d718c0,c2db9500) at 
ithread_execute_handlers+0x122
ithread_loop(c2d4f7b0,d3d28d38) at ithread_loop+0x67
fork_exit(c069fe98,c2d4f7b0,d3d28d38) at fork_exit+0xac
fork_trampoline() at fork_trampoline+0x8
--- trap 0x1, eip = 0, esp = 0xd3d28d6c, ebp = 0 ---
db> panic
panic: from debugger
cpuid = 0
Uptime: 15m6s
Cannot dump. No dump device defined.
Automatic reboot in 15 seconds - press a key on the console to abort
Rebooting...


Here is dmesg:

FreeBSD 7.0-CURRENT #0: Thu Nov 23 16:00:43 CET 2006
     root at fbsd.interex-pla.net:/usr/src/sys/i386/compile/GENERIC
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 2.53GHz (2542.34-MHz 686-class CPU)
   Origin = "GenuineIntel"  Id = 0xf41  Stepping = 1

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=0x651d<SSE3,RSVD2,MON,DS_CPL,TM2,CNTX-ID,CX16,XTPR>
   AMD Features=0x20000000<LM>
real memory  = 536543232 (511 MB)
avail memory = 511270912 (487 MB)
ioapic0 <Version 2.0> irqs 0-23 on motherboard
kbd1 at kbdmux0
ath_hal: 0.9.17.2 (AR5210, AR5211, AR5212, RF5111, RF5112, RF2413, RF5413)
acpi0: <A M I OEMRSDT> on motherboard
     ACPI-0448: *** Error: Looking up [OC06] in namespace, AE_NOT_FOUND
SearchNode 0xc2da9940 StartNode 0xc2da9940 ReturnNode 0
acpi_bus_number: can't get _ADR
acpi_bus_number: can't get _ADR
acpi_bus_number: can't get _ADR
acpi_bus_number: can't get _ADR
acpi_bus_number: can't get _ADR
acpi_bus_number: can't get _ADR
acpi0: Power Button (fixed)
acpi_bus_number: can't get _ADR
acpi_bus_number: can't get _ADR
Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x808-0x80b on acpi0
cpu0: <ACPI CPU> on acpi0
acpi_throttle0: <ACPI CPU Throttling> on cpu0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
pcib1: <ACPI PCI-PCI bridge> irq 16 at device 1.0 on pci0
pci3: <ACPI PCI bus> on pcib1
vgapci0: <VGA-compatible display> port 0xe000-0xe0ff mem 
0xd8000000-0xdfffffff,0xd7fe0000-0xd7feffff irq 16 at device 0.0 on pci3
vgapci1: <VGA-compatible display> mem 0xd7ff0000-0xd7ffffff at device 0.1 
on pci3
pci0: <multimedia> at device 27.0 (no driver attached)
pcib2: <ACPI PCI-PCI bridge> irq 16 at device 28.0 on pci0
pci2: <ACPI PCI bus> on pcib2
uhci0: <Intel 82801FB/FR/FW/FRW (ICH6) USB controller USB-A> port 
0x7400-0x741f irq 23 at device 29.0 on pci0
uhci0: [GIANT-LOCKED]
usb0: <Intel 82801FB/FR/FW/FRW (ICH6) USB controller USB-A> on uhci0
usb0: USB revision 1.0
uhub0: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb0
uhub0: 2 ports with 2 removable, self powered
uhci1: <Intel 82801FB/FR/FW/FRW (ICH6) USB controller USB-B> port 
0x7800-0x781f irq 19 at device 29.1 on pci0
uhci1: [GIANT-LOCKED]
usb1: <Intel 82801FB/FR/FW/FRW (ICH6) USB controller USB-B> on uhci1
usb1: USB revision 1.0
uhub1: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb1
uhub1: 2 ports with 2 removable, self powered
uhci2: <Intel 82801FB/FR/FW/FRW (ICH6) USB controller USB-C> port 
0x8000-0x801f irq 18 at device 29.2 on pci0
uhci2: [GIANT-LOCKED]
usb2: <Intel 82801FB/FR/FW/FRW (ICH6) USB controller USB-C> on uhci2
usb2: USB revision 1.0
uhub2: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb2
uhub2: 2 ports with 2 removable, self powered
uhci3: <Intel 82801FB/FR/FW/FRW (ICH6) USB controller USB-D> port 
0x8400-0x841f irq 16 at device 29.3 on pci0
uhci3: [GIANT-LOCKED]
usb3: <Intel 82801FB/FR/FW/FRW (ICH6) USB controller USB-D> on uhci3
usb3: USB revision 1.0
uhub3: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb3
uhub1: 2 ports with 2 removable, self powered
uhci2: <Intel 82801FB/FR/FW/FRW (ICH6) USB controller USB-C> port 
0x8000-0x801f irq 18 at device 29.2 on pci0
uhci2: [GIANT-LOCKED]
usb2: <Intel 82801FB/FR/FW/FRW (ICH6) USB controller USB-C> on uhci2
usb2: USB revision 1.0
uhub2: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb2
uhub2: 2 ports with 2 removable, self powered
uhci3: <Intel 82801FB/FR/FW/FRW (ICH6) USB controller USB-D> port 
0x8400-0x841f irq 16 at device 29.3 on pci0
uhci3: [GIANT-LOCKED]
usb3: <Intel 82801FB/FR/FW/FRW (ICH6) USB controller USB-D> on uhci3
usb3: USB revision 1.0
uhub3: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb3
uhub3: 2 ports with 2 removable, self powered
ehci0: <Intel 82801FB (ICH6) USB 2.0 controller> mem 0xd7dffc00-0xd7dfffff 
irq 23 at device 29.7 on pci0
ehci0: [GIANT-LOCKED]
usb4: EHCI version 1.0
usb4: companion controllers, 2 ports each: usb0 usb1 usb2 usb3
usb4: <Intel 82801FB (ICH6) USB 2.0 controller> on ehci0
usb4: USB revision 2.0
uhub4: <Intel EHCI root hub, class 9/0, rev 2.00/1.00, addr 1> on usb4
uhub4: 8 ports with 8 removable, self powered
pcib3: <ACPI PCI-PCI bridge> at device 30.0 on pci0
pci1: <ACPI PCI bus> on pcib3
em0: <Intel(R) PRO/1000 Network Connection Version - 6.2.9> port 
0xc400-0xc43f mem 0xd7ec0000-0xd7edffff irq 19 at device 3.0 on pci1
em0: Ethernet address: 00:13:d4:cc:2b:62
em0: [FAST]
pci1: <simple comms> at device 9.0 (no driver attached)
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel ICH6 UDMA100 controller> port 
0xa000-0xa007,0x9800-0x9803,0x9400-0x9407,0x9000-0x9003,0x8800-0x880f irq 
18 at device 31.1 on pci0
ata2: <ATA channel 0> on atapci0
ata3: <ATA channel 1> on atapci0
atapci1: <Intel ICH6 SATA150 controller> port 
0xb800-0xb807,0xb400-0xb403,0xb000-0xb007,0xa800-0xa803,0xa400-0xa40f irq 
19 at device 31.2 on pci0
ata4: <ATA channel 0> on atapci1
ata5: <ATA channel 1> on atapci1
pci0: <serial bus, SMBus> at device 31.3 (no driver attached)
acpi_button0: <Power Button> on acpi0
fdc0: <floppy drive controller (FDE)> port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 
on acpi0
fdc0: [FAST]
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: [GIANT-LOCKED]
psm0: model IntelliMouse, device ID 3
sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on 
acpi0
sio0: type 16550A, console
sio0: [FAST]
pmtimer0 on isa0
orm0: <ISA Option ROM> at iomem 0xc0000-0xcffff pnpid ORM0000 on isa0
ata0 at port 0x1f0-0x1f7,0x3f6 irq 14 on isa0
ata1 at port 0x170-0x177,0x376 irq 15 on isa0
ppc0: parallel port not found.
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x100>
sio1: configured irq 3 not in bitmap of probed irqs 0
sio1: port may not be enabled
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
Timecounter "TSC" frequency 2542344124 Hz quality 800
Timecounters tick every 1.000 msec
acd0: CDRW <SONY CD-RW CRX320E/NYK5> at ata2-slave UDMA33
ad8: 76319MB <WDC WD800JD-00JNA0 05.01C05> at ata4-master SATA150
Trying to mount root from ufs:/dev/ad8s1a
WARNING: / was not properly dismounted
pcm0: <Intel 82801F High Definition Audio Controller> mem 0xd7df8000-0xd7dfbfff irq 16 at device 27.0 on pci0
pcm0: <HDA Codec: Analog Device AD1986A>
pcm0: <HDA Driver Revision: 20061017_0033>
em0: watchdog timeout -- resetting
em0: watchdog timeout -- resetting
em0: watchdog timeout -- resetting
em0: watchdog timeout -- resetting
em0: watchdog timeout -- resetting

Regards,
gg.