Every day my FreeBSD 9.3 machines reboot by watchdog timeout

BBlister bblister at gmail.com
Fri Oct 31 08:06:17 UTC 2014


Greetings,

I have a very strange problem. I am administering a number of FreeBSD
machines (64bit) with:

9.3-STABLE   

and after the upgrade to 9.3 for the past months until now I have noticed
that every day at approximately
the same time the machines reboot by watchdog timeout. I believe the problem
lies on an entry on the crontab which is difficult to debug because the
crontab has too many entries [280 lines].

All the previous versions of freebsd worked fine (even 9.2) and had uptime
for many months. 
After going to 9.3 the problem arose.

I have made debugging symbols for all the kernels and I have some logs of
it, in case you can help me debug this strange problem.

The watchdog fires almost every day in the morning (not exactly at the same
minute), as the log files bellow show. Some days they skip the reboot.


NOTE: This happens in every FreeBSD server that I have updated to 9-3 even
with different hardware. 
If I kill the crontab no reboot will happen (at least for 3 days that I
tried it). 
All the servers bear similar crontab.

The watchdog flags:
watchdogd_flags="-s 30 -t 60 -e /bin/ps"


As you know after 3:00 a lot of house cleaning jobs take place and cpu
raises load, but I believe that
the kernel should not reboot in such situations.

I am reluctant to try:
-disable watchdog, because these servers are required to operate and if they
go down and do not reboot, some users will be upset
-comment one-by-one every process in the crontab, because this will required
a couple of months debugging. 


==>Any clever way how to spot the bug?



1st Machine [This is a real physical machine]:
{NOTE: For many days I had disabled crontab and thus the reboot are less in
this month.}
% last | grep boot
boot time                                  Fri Oct 31 06:34
boot time                                  Thu Oct 30 06:43
boot time                                  Wed Oct 29 06:34
boot time                                  Sun Oct 26 06:45
boot time                                  Sun Oct 19 07:00
boot time                                  Sat Oct 11 03:35
boot time                                  Tue Oct  7 07:39
boot time                                  Mon Oct  6 07:46
boot time                                  Sun Oct  5 07:40
boot time                                  Thu Oct  2 07:40
boot time                                  Wed Oct  1 07:34



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 9.3-STABLE #2 r268794: Sat Oct 11 09:59:45 EEST 2014
    root at XXXXXXXX:/usr/obj/usr/src/sys/bigb5 amd64
FreeBSD clang version 3.4.1 (tags/RELEASE_34/dot1-final 208032) 20140512
CPU: Intel(R) Core(TM)2 Duo CPU     E7600  @ 3.06GHz (3066.70-MHz K8-class
CPU)
  Origin = "GenuineIntel"  Id = 0x1067a  Family = 0x6  Model = 0x17 
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=0xc08e3bd<SSE3,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,XSAVE,OSXSAVE>
  AMD Features=0x20100800<SYSCALL,NX,LM>
  AMD Features2=0x1<LAHF>
  TSC: P-state invariant, performance statistics
real memory  = 4294967296 (4096 MB)
avail memory = 4103790592 (3913 MB)
Event timer "LAPIC" quality 400
ACPI APIC Table: <GBT    GBTUACPI>
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
FreeBSD/SMP: 1 package(s) x 2 core(s)
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  1
ioapic0: Changing APIC ID to 2
ioapic0 <Version 2.0> irqs 0-23 on motherboard
acpi0: <GBT GBTUACPI> on motherboard
acpi0: Power Button (fixed)
acpi0: reservation of 0, a0000 (3) failed
acpi0: reservation of 100000, cfde0000 (3) failed
cpu0: <ACPI CPU> on acpi0
cpu1: <ACPI CPU> on acpi0
attimer0: <AT timer> port 0x40-0x43 on acpi0
Timecounter "i8254" frequency 1193182 Hz quality 0
Event timer "i8254" frequency 1193182 Hz quality 100
hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff irq 0,8 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
atrtc0: <AT realtime clock> port 0x70-0x73 on acpi0
Event timer "RTC" frequency 32768 Hz quality 0
Timecounter "ACPI-fast" frequency 3579545 Hz quality 900
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x408-0x40b on acpi0
acpi_button0: <Power Button> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
pcib1: <PCI-PCI bridge> irq 16 at device 1.0 on pci0
pci1: <PCI bus> on pcib1
vgapci0: <VGA-compatible display> port 0xc000-0xc07f mem
0xe6000000-0xe6ffffff,0xd0000000-0xdfffffff,0xe4000000-0xe5ffffff irq 16 at
device 0.0 on pci1
vgapci0: Boot video device
pci0: <multimedia, HDA> 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
pcib3: <ACPI PCI-PCI bridge> irq 19 at device 28.3 on pci0
pci3: <ACPI PCI bus> on pcib3
re0: <RealTek 8168/8111 B/C/CP/D/DP/E/F/G PCIe Gigabit Ethernet> port
0xd000-0xd0ff mem 0xe9010000-0xe9010fff,0xe9000000-0xe900ffff irq 19 at
device 0.0 on pci3
re0: Using 1 MSI-X message
re0: Chip rev. 0x3c000000
re0: MAC rev. 0x00400000
miibus0: <MII bus> on re0
rgephy0: <RTL8169S/8110S/8211 1000BASE-T media interface> PHY 1 on miibus0
rgephy0:  none, 10baseT, 10baseT-FDX, 10baseT-FDX-flow, 100baseTX,
100baseTX-FDX, 100baseTX-FDX-flow, 1000baseT, 1000baseT-master,
1000baseT-FDX, 1000baseT-FDX-master, 1000baseT-FDX-flow,
1000baseT-FDX-flow-master, auto, auto-flow
re0: Ethernet address: 00:24:1d:71:e4:83
uhci0: <Intel 82801G (ICH7) USB controller USB-A> port 0xe000-0xe01f irq 23
at device 29.0 on pci0
usbus0 on uhci0
uhci1: <Intel 82801G (ICH7) USB controller USB-B> port 0xe100-0xe11f irq 19
at device 29.1 on pci0
usbus1 on uhci1
uhci2: <Intel 82801G (ICH7) USB controller USB-C> port 0xe200-0xe21f irq 18
at device 29.2 on pci0
usbus2 on uhci2
uhci3: <Intel 82801G (ICH7) USB controller USB-D> port 0xe300-0xe31f irq 16
at device 29.3 on pci0
usbus3 on uhci3
ehci0: <Intel 82801GB/R (ICH7) USB 2.0 controller> mem 0xe9104000-0xe91043ff
irq 23 at device 29.7 on pci0
usbus4: EHCI version 1.0
usbus4 on ehci0
pcib4: <ACPI PCI-PCI bridge> at device 30.0 on pci0
pci4: <ACPI PCI bus> on pcib4
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel ICH7 SATA300 controller> port
0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xf000-0xf00f at device 31.2 on pci0
ata0: <ATA channel> at channel 0 on atapci0
ata1: <ATA channel> at channel 1 on atapci0
uart0: <16550 or compatible> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
uart0: console (9600,n,8,1)
atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
ichwd0 on isa0
orm0: <ISA Option ROM> at iomem 0xc0000-0xcdfff on isa0
wbwd0: HEFRAS and EFER do not align: EFER 0x2e DevID 0xff DevRev 0xff CR26
0xff
acpi_perf0: <ACPI CPU Frequency Control> on cpu0
coretemp0: <CPU On-Die Thermal Sensors> on cpu0
p4tcc0: <CPU Frequency Thermal Control> on cpu0
coretemp1: <CPU On-Die Thermal Sensors> on cpu1
est1: <Enhanced SpeedStep Frequency Control> on cpu1
est: CPU supports Enhanced Speedstep, but is not recognized.
est: cpu_vendor GenuineIntel, msr 6164b2106000921
device_attach: est1 attach returned 6
p4tcc1: <CPU Frequency Thermal Control> on cpu1
Timecounters tick every 1.000 msec
vboxdrv: fAsync=0 offMin=0x192 offMax=0x325
ipfw2 (+ipv6) initialized, divert enabled, nat enabled, default to accept,
logging disabled
usbus0: 12Mbps Full Speed USB v1.0
usbus1: 12Mbps Full Speed USB v1.0
ugen0.1: <Intel> at usbus0
uhub0: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus0
ugen1.1: <Intel> at usbus1
uhub1: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus1
usbus2: 12Mbps Full Speed USB v1.0
usbus3: 12Mbps Full Speed USB v1.0
ugen2.1: <Intel> at usbus2
uhub2: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus2
ugen3.1: <Intel> at usbus3
uhub3: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus3
uhub0: 2 ports with 2 removable, self powered
usbus4: 480Mbps High Speed USB v2.0
ad0: 715403MB <WDC WD7501AALS-00E8B0 05.00K05> at ata0-master UDMA100 SATA
uhub1: 2 ports with 2 removable, self powered
ugen4.1: <Intel> at usbus4
uhub4: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus4
uhub2: 2 ports with 2 removable, self powered
uhub3: 2 ports with 2 removable, self powered
SMP: AP CPU #1 Launched!
Timecounter "TSC-low" frequency 1533348854 Hz quality 1000
Root mount waiting for: usbus4
Root mount waiting for: usbus4
Root mount waiting for: usbus4
uhub4: 8 ports with 8 removable, self powered
Root mount waiting for: usbus4
Root mount waiting for: usbus4
ugen4.2: <Kingston> at usbus4
umass0: <Kingston DT 101 G2, class 0/0, rev 2.00/0.00, addr 2> on usbus4
Trying to mount root from ufs:/dev/ad0s1a [ro]...
da0 at umass-sim0 bus 0 scbus0 target 0 lun 0
da0: <kingston DT 101 G2 1.00> Removable Direct Access SCSI-4 device
da0: Serial Number 001478544883AC5107B80394
da0: 40.000MB/s transfers
da0: 7392MB (15138816 512 byte sectors: 255H 63S/T 942C)
da0: quirks=0x2<NO_6_BYTE>
WARNING: / was not properly dismounted
ZFS filesystem version: 5
ZFS storage pool version: features support (5000)
cryptosoft0: <software crypto> on motherboard
vboxnet0: Ethernet address: 0a:00:27:00:00:00
tun0: link state changed to UP
nd6_setmtu0: new link MTU on tun0 (1130) is too small for IPv6
tap0: Ethernet address: 00:bd:3a:fc:06:00
tap0: link state changed to UP
vboxnet0: promiscuous mode enabled





Unread portion of the kernel message buffer:
interrupt                   total
irq1: atkbd0                           2
irq11: em0 uhci0+                4037862
irq15: ata1                            3
cpu0:timer                       8849845
irq257: virtio_pci1               686513
Total                    13574225
panic: watchdog timeout
cpuid = 0
Uptime: 1d1h18m3s
Dumping 107 out of 502 MB:..15%..30%..45%..60%..75%..90%

(kgdb) bt
#0  doadump (textdump=<value optimized out>) at pcpu.h:235
#1  0xffffffff8041554f in kern_reboot (howto=260) at
/usr/src/sys/kern/kern_shutdown.c:454
#2  0xffffffff80415997 in panic (fmt=<value optimized out>) at
/usr/src/sys/kern/kern_shutdown.c:642
#3  0xffffffff803c96b4 in watchdog_fire () at
/usr/src/sys/kern/kern_clock.c:898
#4  0xffffffff803c99e5 in hardclock_cnt (cnt=<value optimized out>,
usermode=<value optimized out>) at /usr/src/sys/kern/kern_clock.c:570
#5  0xffffffff806297bc in handleevents (now=0xffffff8000231978, fake=0) at
/usr/src/sys/kern/kern_clocksource.c:215
#6  0xffffffff8062a3b9 in timercb (et=<value optimized out>, arg=<value
optimized out>) at /usr/src/sys/kern/kern_clocksource.c:390
#7  0xffffffff8065c70c in lapic_handle_timer (frame=0xffffff80002319f0) at
/usr/src/sys/x86/x86/local_apic.c:818
#8  0xffffffff805e868c in Xtimerint () at apic_vector.S:103
#9  0xffffffff805e49e6 in acpi_cpu_c1 () at
/usr/src/sys/amd64/acpica/acpi_machdep.c:95
#10 0xffffffff802bce7a in acpi_cpu_idle () at
/usr/src/sys/dev/acpica/acpi_cpu.c:1023
#11 0xffffffff805ebfc8 in cpu_idle_acpi (busy=0) at
/usr/src/sys/amd64/amd64/machdep.c:678
#12 0xffffffff805ec082 in cpu_idle (busy=0) at
/usr/src/sys/amd64/amd64/machdep.c:805
#13 0xffffffff8043d832 in sched_idletd (dummy=<value optimized out>) at
/usr/src/sys/kern/sched_ule.c:2610
#14 0xffffffff803e7455 in fork_exit (callout=0xffffffff8043d680
<sched_idletd>, arg=0x0, frame=0xffffff8000231c40) at
/usr/src/sys/kern/kern_fork.c:996
#15 0xffffffff805e806e in fork_trampoline () at
/usr/src/sys/amd64/amd64/exception.S:606
#16 0x0000000000000000 in ?? ()





2nd machine [This is a VPS machine running in the cloud]:

% last | grep boot
boot time                                  Fri Oct 31 06:33
boot time                                  Thu Oct 30 06:33
boot time                                  Wed Oct 29 06:33
boot time                                  Tue Oct 28 06:33
boot time                                  Mon Oct 27 06:33
boot time                                  Sun Oct 26 06:04
boot time                                  Sat Oct 25 06:33
boot time                                  Fri Oct 24 06:33
boot time                                  Thu Oct 23 06:33
boot time                                  Wed Oct 22 06:33
boot time                                  Tue Oct 21 06:33
boot time                                  Mon Oct 20 06:33
boot time                                  Sun Oct 19 06:32
boot time                                  Sat Oct 18 06:33
boot time                                  Fri Oct 17 06:32
boot time                                  Thu Oct 16 06:33
boot time                                  Wed Oct 15 06:33
boot time                                  Tue Oct 14 06:33
boot time                                  Mon Oct 13 06:33
boot time                                  Sun Oct 12 07:04
boot time                                  Sat Oct 11 07:04
boot time                                  Fri Oct 10 07:04
boot time                                  Thu Oct  9 07:04
boot time                                  Wed Oct  8 07:04
boot time                                  Tue Oct  7 07:04
boot time                                  Mon Oct  6 07:04
boot time                                  Sun Oct  5 07:04
boot time                                  Sat Oct  4 07:04
boot time                                  Fri Oct  3 07:04
boot time                                  Thu Oct  2 07:04
boot time                                  Wed Oct  1 07:04


Copyright (c) 1992-2014 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 9.3-STABLE #6 r271376: Sun Oct 12 10:25:52 EEST 2014
    root at XXXXXXX:/usr/obj/usr/src/sys/arch amd64
FreeBSD clang version 3.4.1 (tags/RELEASE_34/dot1-final 208032) 20140512
CPU: QEMU Virtual CPU version 1.1.2 (2266.76-MHz K8-class CPU)
  Origin = "GenuineIntel"  Id = 0x623  Family = 0x6  Model = 0x2  Stepping =
3
 
Features=0x783fbfd<FPU,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE,SSE2>
  Features2=0x80802001<SSE3,CX16,POPCNT,HV>
  AMD Features=0x20100800<SYSCALL,NX,LM>
  AMD Features2=0x1<LAHF>
real memory  = 536870912 (512 MB)
avail memory = 502841344 (479 MB)
Event timer "LAPIC" quality 400
ACPI APIC Table: <BOCHS  BXPCAPIC>
ioapic0: Changing APIC ID to 1
ioapic0 <Version 1.1> irqs 0-23 on motherboard
acpi0: <BOCHS BXPCRSDT> on motherboard
acpi0: Power Button (fixed)
cpu0: <ACPI CPU> on acpi0
atrtc0: <AT realtime clock> port 0x70-0x71,0x72-0x77 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 100000000 Hz quality 950
Timecounter "ACPI-fast" frequency 3579545 Hz quality 900
acpi_timer0: <24-bit timer at 3.579545MHz> port 0xb008-0xb00b on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
pci_link4: Unable to route IRQs: AE_NOT_FOUND
isab0: <PCI-ISA bridge> at device 1.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel PIIX3 WDMA2 controller> port
0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xc0c0-0xc0cf at device 1.1 on pci0
ata0: <ATA channel> at channel 0 on atapci0
ata1: <ATA channel> at channel 1 on atapci0
uhci0: <Intel 82371SB (PIIX3) USB controller> port 0xc080-0xc09f irq 11 at
device 1.2 on pci0
usbus0: controller did not stop
usbus0 on uhci0
pci0: <bridge> at device 1.3 (no driver attached)
vgapci0: <VGA-compatible display> mem
0xfc000000-0xfdffffff,0xfebf0000-0xfebf0fff at device 2.0 on pci0
vgapci0: Boot video device
virtio_pci0: <VirtIO PCI Balloon adapter> port 0xc0a0-0xc0bf irq 11 at
device 3.0 on pci0
vtballoon0: <VirtIO Balloon Adapter> on virtio_pci0
virtio_pci0: host features: 0x71000002
<EventIdx,RingIndirect,NotifyOnEmpty,StatsVq>
virtio_pci0: negotiated features: 0
em0: <Intel(R) PRO/1000 Legacy Network Connection 1.0.6> port 0xc000-0xc03f
mem 0xfeba0000-0xfebbffff irq 11 at device 4.0 on pci0
em0: Ethernet address: de:db:ee:d9:35:32
virtio_pci1: <VirtIO PCI Block adapter> port 0xc040-0xc07f mem
0xfebf1000-0xfebf1fff irq 10 at device 5.0 on pci0
vtblk0: <VirtIO Block Adapter> on virtio_pci1
virtio_pci1: host features: 0x710006d4
<EventIdx,RingIndirect,NotifyOnEmpty,Topology,WriteCache,SCSICmds,BlockSize,DiskGeometry,MaxNumSegs>
virtio_pci1: negotiated features: 0x10000254
<RingIndirect,WriteCache,BlockSize,DiskGeometry,MaxNumSegs>
vtblk0: 80000MB (163840000 512 byte sectors)
atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
attimer0: <AT timer> at port 0x40 on isa0
Timecounter "i8254" frequency 1193182 Hz quality 0
Event timer "i8254" frequency 1193182 Hz quality 100
wbwd0: HEFRAS and EFER do not align: EFER 0x2e DevID 0xff DevRev 0xff CR26
0xff
Timecounters tick every 10.000 msec
ipfw2 (+ipv6) initialized, divert enabled, nat enabled, default to accept,
logging disabled
usbus0: 12Mbps Full Speed USB v1.0
ugen0.1: <Intel> at usbus0
uhub0: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus0
pass0 at ata1 bus 0 scbus1 target 0 lun 0
pass0: <QEMU QEMU DVD-ROM 1.1.> Removable CD-ROM SCSI-0 device
pass0: Serial Number QM00003
pass0: 16.700MB/s transfers (WDMA2, ATAPI 12bytes, PIO 65534bytes)
Timecounter "TSC-low" frequency 1133381229 Hz quality 800
uhub0: 2 ports with 2 removable, self powered
Root mount waiting for: usbus0
ugen0.2: <QEMU 1.1.2> at usbus0
Trying to mount root from ufs:/dev/vtbd0s1a [ro]...
uhid0: <QEMU 1.1.2 QEMU USB Tablet, class 0/0, rev 1.00/0.00, addr 2> on
usbus0
tap0: Ethernet address: 00:bd:ae:4b:01:00
tap0: link state changed to UP
tap0: link state changed to DOWN
tap0: Ethernet address: 00:bd:43:20:06:00
tap0: link state changed to UP



Unread portion of the kernel message buffer:
interrupt                   total
irq4: uart0                         1176
irq14: ata0                      2924496
irq15: ata1                            1
irq20: hpet0                    86588821
irq23: uhci0 ehci0               8813832
irq256: re0                      6199647
Total                   104527973
panic: watchdog timeout
cpuid = 0
Uptime: 23h48m59s
Dumping 933 out of 4085 MB: (CTRL-C to abort)
..2%..11%..21%..31%..42%..52%..62%..71%..81%..91%

(kgdb)  bt
#0  doadump (textdump=<value optimized out>) at pcpu.h:235
#1  0xffffffff803bfd6f in kern_reboot (howto=260) at
/usr/src/sys/kern/kern_shutdown.c:454
#2  0xffffffff803c01b7 in panic (fmt=<value optimized out>) at
/usr/src/sys/kern/kern_shutdown.c:642
#3  0xffffffff80373e84 in watchdog_fire () at
/usr/src/sys/kern/kern_clock.c:898
#4  0xffffffff803741b5 in hardclock_cnt (cnt=<value optimized out>,
usermode=<value optimized out>) at /usr/src/sys/kern/kern_clock.c:570
#5  0xffffffff805bb90c in handleevents (now=0xffffff8000245858, fake=0) at
/usr/src/sys/kern/kern_clocksource.c:215
#6  0xffffffff805bc498 in timercb (et=<value optimized out>, arg=<value
optimized out>) at /usr/src/sys/kern/kern_clocksource.c:390
#7  0xffffffff802bb667 in hpet_intr_single (arg=<value optimized out>) at
/usr/src/sys/dev/acpica/acpi_hpet.c:260
#8  0xffffffff802bb70e in hpet_intr (arg=0xffffff8000648000) at
/usr/src/sys/dev/acpica/acpi_hpet.c:278
#9  0xffffffff8039414b in intr_event_handle (ie=0xfffffe0001944a00,
frame=0xffffff80002459b0) at /usr/src/sys/kern/kern_intr.c:1446
#10 0xffffffff805eb3d8 in intr_execute_handlers (isrc=0xfffffe0001927ce8,
frame=0xffffff80002459b0) at /usr/src/sys/x86/x86/intr_machdep.c:266
#11 0xffffffff805ee78f in lapic_handle_intr (vector=<value optimized out>,
frame=0x0) at /usr/src/sys/x86/x86/local_apic.c:780
#12 0xffffffff805905d4 in Xapic_isr1 () at apic_vector.S:86
#13 0xffffffff8058cde6 in acpi_cpu_c1 () at
/usr/src/sys/amd64/acpica/acpi_machdep.c:95
#14 0xffffffff802b7fda in acpi_cpu_idle () at
/usr/src/sys/dev/acpica/acpi_cpu.c:1023
#15 0xffffffff805943c8 in cpu_idle_acpi (busy=0) at
/usr/src/sys/amd64/amd64/machdep.c:678
#16 0xffffffff80594482 in cpu_idle (busy=0) at
/usr/src/sys/amd64/amd64/machdep.c:805
#17 0xffffffff803e8052 in sched_idletd (dummy=<value optimized out>) at
/usr/src/sys/kern/sched_ule.c:2609
#18 0xffffffff80391c25 in fork_exit (callout=0xffffffff803e7ea0
<sched_idletd>, arg=0x0, frame=0xffffff8000245c00) at
/usr/src/sys/kern/kern_fork.c:996
#19 0xffffffff8059046e in fork_trampoline () at
/usr/src/sys/amd64/amd64/exception.S:606
#20 0x0000000000000000 in ?? ()




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