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        The Regents of the University of California. All rights reserved.
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FreeBSD 12.0-CURRENT #0 r319859: Mon Jun 12 19:37:22 UTC 2017
    root@releng3.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC amd64
FreeBSD clang version 4.0.0 (tags/RELEASE_400/final 297347) (based on LLVM 4.0.0)
WARNING: WITNESS option enabled, expect reduced performance.
VT(vga): resolution 640x480
CPU: Intel(R) Atom(TM) CPU D525   @ 1.80GHz (1800.03-MHz K8-class CPU)
  Origin="GenuineIntel"  Id=0x106ca  Family=0x6  Model=0x1c  Stepping=10
  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=0x40e31d<SSE3,DTES64,MON,DS_CPL,TM2,SSSE3,CX16,xTPR,PDCM,MOVBE>
  AMD Features=0x20100800<SYSCALL,NX,LM>
  AMD Features2=0x1<LAHF>
  TSC: P-state invariant, performance statistics
real memory  = 4294967296 (4096 MB)
avail memory = 4063928320 (3875 MB)
Event timer "LAPIC" quality 100
ACPI APIC Table: <030314 APIC1001>
FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
FreeBSD/SMP: 1 package(s) x 2 core(s) x 2 hardware threads
arc4random: no preloaded entropy cache
ioapic0: Changing APIC ID to 4
ioapic0 <Version 2.0> irqs 0-23 on motherboard
SMP: AP CPU #1 Launched!
SMP: AP CPU #2 Launched!
SMP: AP CPU #3 Launched!
Timecounter "TSC" frequency 1800034641 Hz quality 1000
random: entropy device external interface
netmap: loaded module
[ath_hal] loaded
module_register_init: MOD_LOAD (vesa, 0xffffffff80f5af40, 0) error 19
kbd1 at kbdmux0
nexus0
vtvga0: <VT VGA driver> on motherboard
cryptosoft0: <software crypto> on motherboard
acpi0: <030314 RSDT1001> on motherboard
acpi0: Power Button (fixed)
cpu0: <ACPI CPU> on acpi0
cpu1: <ACPI CPU> on acpi0
cpu2: <ACPI CPU> on acpi0
cpu3: <ACPI CPU> on acpi0
attimer0: <AT timer> port 0x40-0x43 irq 0 on acpi0
Timecounter "i8254" frequency 1193182 Hz quality 0
Event timer "i8254" frequency 1193182 Hz quality 100
atrtc0: <AT realtime clock> port 0x70-0x71 irq 8 on acpi0
Event timer "RTC" frequency 32768 Hz quality 0
hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff on acpi0
Timecounter "HPET" frequency 14318180 Hz quality 950
Event timer "HPET" frequency 14318180 Hz quality 450
Event timer "HPET1" frequency 14318180 Hz quality 440
Event timer "HPET2" frequency 14318180 Hz quality 440
Timecounter "ACPI-fast" frequency 3579545 Hz quality 900
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x808-0x80b on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
vgapci0: <VGA-compatible display> port 0x7c00-0x7c07 mem 0xfe500000-0xfe57ffff,0xd0000000-0xdfffffff,0xfe400000-0xfe4fffff irq 16 at device 2.0 on pci0
agp0: <Intel Pineview SVGA controller> on vgapci0
agp0: aperture size is 256M, detected 8188k stolen memory
vgapci0: Boot video device
vgapci1: <VGA-compatible display> mem 0xfe380000-0xfe3fffff at device 2.1 on pci0
pcib1: <ACPI PCI-PCI bridge> irq 22 at device 28.0 on pci0
pci1: <ACPI PCI bus> on pcib1
em0: <Intel(R) PRO/1000 Network Connection> port 0x9c00-0x9c1f mem 0xfe6e0000-0xfe6fffff,0xfe6dc000-0xfe6dffff irq 16 at device 0.0 on pci1
em0: attach_pre capping queues at 2
Current cap: 0x460b
em0: using 1024 tx descriptors and 1024 rx descriptors
em0: msix_init qsets capped at 2
em0: pxm cpus: 2 queue msgs: 4 admincnt: 1
em0: queue equality override not set, capping rx_queues at 2 and tx_queues at 2
em0: using 2 rx queues 2 tx queues
em0: Using MSIX interrupts with 3 vectors
em0: allocated for 2 tx_queues
em0: allocated for 2 rx_queues
em0: Ethernet address: 00:90:0b:33:74:c0
em0: netmap queues/slots: TX 2/1024, RX 2/1024
pcib2: <ACPI PCI-PCI bridge> irq 23 at device 28.1 on pci0
pci2: <ACPI PCI bus> on pcib2
em1: <Intel(R) PRO/1000 Network Connection> port 0xac00-0xac1f mem 0xfe7e0000-0xfe7fffff,0xfe7dc000-0xfe7dffff irq 17 at device 0.0 on pci2
em1: attach_pre capping queues at 1
em1: using 1024 tx descriptors and 1024 rx descriptors
em1: msix_init qsets capped at 1
em1: pxm cpus: 2 queue msgs: 0 admincnt: 1
em1: queue equality override not set, capping rx_queues at 0 and tx_queues at 0
em1: using 0 rx queues 0 tx queues
em1: Using MSIX interrupts with 1 vectors
panic: Assertion adapter->tx_num_queues > 0 failed at /usr/src/sys/dev/e1000/if_em.c:2664
cpuid = 2
time = 1
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xffffffff826702f0
vpanic() at vpanic+0x19c/frame 0xffffffff82670370
kassert_panic() at kassert_panic+0x126/frame 0xffffffff826703e0
em_if_tx_queues_alloc() at em_if_tx_queues_alloc+0x1d2/frame 0xffffffff82670430
iflib_device_register() at iflib_device_register+0x1e92/frame 0xffffffff82670760
iflib_device_attach() at iflib_device_attach+0xb7/frame 0xffffffff82670790
device_attach() at device_attach+0x3de/frame 0xffffffff826707d0
bus_generic_attach() at bus_generic_attach+0x5a/frame 0xffffffff826707f0
pci_attach() at pci_attach+0xd5/frame 0xffffffff82670830
device_attach() at device_attach+0x3de/frame 0xffffffff82670870
bus_generic_attach() at bus_generic_attach+0x5a/frame 0xffffffff82670890
acpi_pcib_pci_attach() at acpi_pcib_pci_attach+0xa1/frame 0xffffffff826708d0
device_attach() at device_attach+0x3de/frame 0xffffffff82670910
bus_generic_attach() at bus_generic_attach+0x5a/frame 0xffffffff82670930
pci_attach() at pci_attach+0xd5/frame 0xffffffff82670970
device_attach() at device_attach+0x3de/frame 0xffffffff826709b0
bus_generic_attach() at bus_generic_attach+0x5a/frame 0xffffffff826709d0
acpi_pcib_acpi_attach() at acpi_pcib_acpi_attach+0x3b9/frame 0xffffffff82670a40
device_attach() at device_attach+0x3de/frame 0xffffffff82670a80
bus_generic_attach() at bus_generic_attach+0x5a/frame 0xffffffff82670aa0
acpi_attach() at acpi_attach+0xd67/frame 0xffffffff82670b50
device_attach() at device_attach+0x3de/frame 0xffffffff82670b90
bus_generic_attach() at bus_generic_attach+0x5a/frame 0xffffffff82670bb0
nexus_acpi_attach() at nexus_acpi_attach+0x73/frame 0xffffffff82670be0
device_attach() at device_attach+0x3de/frame 0xffffffff82670c20
bus_generic_new_pass() at bus_generic_new_pass+0x116/frame 0xffffffff82670c50
bus_set_pass() at bus_set_pass+0x8c/frame 0xffffffff82670c80
configure() at configure+0x9/frame 0xffffffff82670c90
mi_startup() at mi_startup+0x9c/frame 0xffffffff82670cb0
btext() at btext+0x2c
KDB: enter: panic
[ thread pid 0 tid 100000 ]
Stopped at      kdb_enter+0x3b: movq    $0,kdb_why