Random hangs with 7.1-PRE

[Richard Tector]

I'm not discounting hardware here, but I'm having problems with a 
previously stable amd64 system (dmesg attached) now running:
FreeBSD 7.1-PRERELEASE #1: Wed Nov 26 00:10:41 GMT 2008
and previously running a RELENG_7 from around Oct 15th which also 
exhibited the problem.

The system appears to hang with SSH terminals eventually timing out, and 
no other services being available. The odd thing is, when I go to the 
console, I can switch between terminals with Alt-F2, etc, but can not 
type anything. Pressing the power button a couple of times gives an acpi 
not ready message, so it doesn't appear the system has completely hung.

The system is in a cool room and under little load running basic 
services: samba, postgres, dhcp, etc. Never seen problems with the 
machine previously.

Does anyone have any thoughts or suggestions on narrowing down the cause?

Regards,

Richard Tector
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FreeBSD 7.1-PRERELEASE #1: Wed Nov 26 00:10:41 GMT 2008
    richard at daffy.tector.org.uk:/usr/obj/usr/src/sys/DAFFY
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Pentium(R) Dual  CPU  E2160  @ 1.80GHz (1795.51-MHz K8-class CPU)
  Origin = "GenuineIntel"  Id = 0x6fd  Stepping = 13
  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=0xe39d<SSE3,RSVD2,MON,DS_CPL,EST,TM2,SSSE3,CX16,xTPR,PDCM>
  AMD Features=0x20100800<SYSCALL,NX,LM>
  AMD Features2=0x1<LAHF>
  Cores per package: 2
usable memory = 2137554944 (2038 MB)
avail memory  = 2062880768 (1967 MB)
ACPI APIC Table: <PTLTD          APIC  >
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  1
ioapic0 <Version 2.0> irqs 0-23 on motherboard
kbd1 at kbdmux0
acpi0: <PTLTD    XSDT> on motherboard
acpi0: [ITHREAD]
acpi0: Power Button (fixed)
Timecounter "ACPI-safe" frequency 3579545 Hz quality 850
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x1008-0x100b on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
pci0: <ACPI PCI bus> on pcib0
uhci0: <UHCI (generic) USB controller> port 0x1820-0x183f irq 16 at device 26.0 on pci0
uhci0: [GIANT-LOCKED]
uhci0: [ITHREAD]
usb0: <UHCI (generic) USB controller> 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: <UHCI (generic) USB controller> port 0x1840-0x185f irq 17 at device 26.1 on pci0
uhci1: [GIANT-LOCKED]
uhci1: [ITHREAD]
usb1: <UHCI (generic) USB controller> 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: <UHCI (generic) USB controller> port 0x1860-0x187f irq 18 at device 26.2 on pci0
uhci2: [GIANT-LOCKED]
uhci2: [ITHREAD]
usb2: <UHCI (generic) USB controller> 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
ehci0: <EHCI (generic) USB 2.0 controller> mem 0xf4a02800-0xf4a02bff irq 18 at device 26.7 on pci0
ehci0: [GIANT-LOCKED]
ehci0: [ITHREAD]
usb3: EHCI version 1.0
usb3: companion controllers, 2 ports each: usb0 usb1 usb2
usb3: <EHCI (generic) USB 2.0 controller> on ehci0
usb3: USB revision 2.0
uhub3: <Intel EHCI root hub, class 9/0, rev 2.00/1.00, addr 1> on usb3
uhub3: 6 ports with 6 removable, self powered
umass0: <Cypress Semiconductor USB2.0 Storage Device, class 0/0, rev 2.00/0.01, addr 2> on uhub3
pcib1: <ACPI PCI-PCI bridge> irq 16 at device 28.0 on pci0
pci5: <ACPI PCI bus> on pcib1
pcib2: <ACPI PCI-PCI bridge> at device 0.0 on pci5
pci6: <ACPI PCI bus> on pcib2
pcib3: <PCI-PCI bridge> at device 8.0 on pci6
pci7: <PCI bus> on pcib3
arcmsr0: <Areca SATA Host Adapter RAID Controller (RAID6 capable)
> mem 0xf4500000-0xf4500fff,0xf4000000-0xf43fffff irq 18 at device 14.0 on pci7
ARECA RAID ADAPTER0: Driver Version 1.20.00.15 2007-10-07
ARECA RAID ADAPTER0: FIRMWARE VERSION V1.42 2006-10-13
arcmsr0: [ITHREAD]
pcib4: <ACPI PCI-PCI bridge> irq 16 at device 28.4 on pci0
pci13: <ACPI PCI bus> on pcib4
em0: <Intel(R) PRO/1000 Network Connection 6.9.5> port 0x2000-0x201f mem 0xf4480000-0xf449ffff,0xf4400000-0xf447ffff irq 16 at device 0.0 on pci13
em0: Using MSI interrupt
em0: [FILTER]
em0: Ethernet address: 00:e0:81:79:fd:0e
pcib5: <ACPI PCI-PCI bridge> irq 17 at device 28.5 on pci0
pci15: <ACPI PCI bus> on pcib5
em1: <Intel(R) PRO/1000 Network Connection 6.9.5> port 0x3000-0x301f mem 0xf4680000-0xf469ffff,0xf4600000-0xf467ffff irq 17 at device 0.0 on pci15
em1: Using MSI interrupt
em1: [FILTER]
em1: Ethernet address: 00:e0:81:79:fd:0f
uhci3: <UHCI (generic) USB controller> port 0x1880-0x189f irq 16 at device 29.0 on pci0
uhci3: [GIANT-LOCKED]
uhci3: [ITHREAD]
usb4: <UHCI (generic) USB controller> on uhci3
usb4: USB revision 1.0
uhub4: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb4
uhub4: 2 ports with 2 removable, self powered
uhci4: <UHCI (generic) USB controller> port 0x18a0-0x18bf irq 17 at device 29.1 on pci0
uhci4: [GIANT-LOCKED]
uhci4: [ITHREAD]
usb5: <UHCI (generic) USB controller> on uhci4
usb5: USB revision 1.0
uhub5: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb5
uhub5: 2 ports with 2 removable, self powered
uhci5: <UHCI (generic) USB controller> port 0x18c0-0x18df irq 18 at device 29.2 on pci0
uhci5: [GIANT-LOCKED]
uhci5: [ITHREAD]
usb6: <UHCI (generic) USB controller> on uhci5
usb6: USB revision 1.0
uhub6: <Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb6
uhub6: 2 ports with 2 removable, self powered
ehci1: <EHCI (generic) USB 2.0 controller> mem 0xf4a02c00-0xf4a02fff irq 16 at device 29.7 on pci0
ehci1: [GIANT-LOCKED]
ehci1: [ITHREAD]
usb7: EHCI version 1.0
usb7: companion controllers, 2 ports each: usb4 usb5 usb6
usb7: <EHCI (generic) USB 2.0 controller> on ehci1
usb7: USB revision 2.0
uhub7: <Intel EHCI root hub, class 9/0, rev 2.00/1.00, addr 1> on usb7
uhub7: 6 ports with 6 removable, self powered
pcib6: <ACPI PCI-PCI bridge> at device 30.0 on pci0
pci17: <ACPI PCI bus> on pcib6
fxp0: <Intel 82550 Pro/100 Ethernet> port 0x4080-0x40bf mem 0xf4720000-0xf4720fff,0xf4700000-0xf471ffff irq 21 at device 0.0 on pci17
miibus0: <MII bus> on fxp0
inphy0: <i82555 10/100 media interface> PHY 1 on miibus0
inphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
fxp0: Ethernet address: 00:02:b3:ce:6f:15
fxp0: [ITHREAD]
vgapci0: <VGA-compatible display> port 0x4000-0x407f mem 0xf0000000-0xf3ffffff,0xf4740000-0xf477ffff at device 3.0 on pci17
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel ICH9 SATA300 controller> port 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0x1c20-0x1c2f,0x1c10-0x1c1f at device 31.2 on pci0
ata0: <ATA channel 0> on atapci0
ata0: [ITHREAD]
ata1: <ATA channel 1> on atapci0
ata1: [ITHREAD]
pci0: <serial bus, SMBus> at device 31.3 (no driver attached)
atapci1: <Intel ICH9 SATA300 controller> port 0x1c98-0x1c9f,0x1c8c-0x1c8f,0x1c90-0x1c97,0x1c88-0x1c8b,0x1c40-0x1c4f,0x1c30-0x1c3f irq 18 at device 31.5 on pci0
atapci1: [ITHREAD]
ata2: <ATA channel 0> on atapci1
ata2: [ITHREAD]
ata3: <ATA channel 1> on atapci1
ata3: [ITHREAD]
pci0: <dasp> at device 31.6 (no driver attached)
acpi_button0: <Power Button> on acpi0
atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
atkbd0: [ITHREAD]
uart0: <16550 or compatible> port 0x3f8-0x3ff irq 4 on acpi0
uart0: [FILTER]
uart1: <16550 or compatible> port 0x2f8-0x2ff irq 3 on acpi0
uart1: [FILTER]
cpu0: <ACPI CPU> on acpi0
est0: <Enhanced SpeedStep Frequency Control> on cpu0
p4tcc0: <CPU Frequency Thermal Control> on cpu0
cpu1: <ACPI CPU> on acpi0
est1: <Enhanced SpeedStep Frequency Control> on cpu1
p4tcc1: <CPU Frequency Thermal Control> on cpu1
cryptosoft0: <software crypto> on motherboard
orm0: <ISA Option ROMs> at iomem 0xc0000-0xc7fff,0xc8000-0xc8fff on isa0
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
Timecounters tick every 1.000 msec
IPsec: Initialized Security Association Processing.
ad0: 238418MB <WDC WD2500JS-75NCB3 10.02E04> at ata0-master SATA300
Waiting 5 seconds for SCSI devices to settle
(probe17:arcmsr0:0:16:0): inquiry data fails comparison at DV1 step
da0 at arcmsr0 bus 0 target 0 lun 0
da0: <Areca BigVol01 R001> Fixed Direct Access SCSI-5 device
da0: 166.666MB/s transfers (83.333MHz DT, offset 32, 16bit)
da0: 1831054MB (3749999616 512 byte sectors: 255H 63S/T 233426C)
SMP: AP CPU #1 Launched!
cd0 at umass-sim0 bus 0 target 0 lun 0
cd0: <PLEXTOR DVD-ROM PX-130A 1.01> Removable CD-ROM SCSI-0 device
cd0: 40.000MB/s transfers
cd0: Attempt to query device size failed: NOT READY, Medium not present - tray closed
Trying to mount root from ufs:/dev/ad0s1a
WARNING: / was not properly dismounted
WARNING: /tmp was not properly dismounted
WARNING: /usr was not properly dismounted
WARNING: /var was not properly dismounted
WARNING: /home was not properly dismounted
WARNING: /data2 was not properly dismounted
WARNING: attempt to net_add_domain(netgraph) after domainfinalize()
em0: link state changed to UP