Date: Wed, 26 Jan 2005 04:48:40 +0000 From: Chris <chrcoluk@gmail.com> To: Artem Kuchin <matrix@itlegion.ru> Cc: Robert Watson <rwatson@freebsd.org> Subject: Re: Lock up problems with 5.3-STABLE (was: Cannot build kernel with options WITNESS) Message-ID: <3aaaa3a05012520483adb5de6@mail.gmail.com> In-Reply-To: <00ba01c50211$23389ee0$0c00a8c0@artem> References: <Pine.NEB.3.96L.1050122222459.19903T-100000@fledge.watson.org> <00ba01c50211$23389ee0$0c00a8c0@artem>
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I would suspect the jail code at this point here is my kernel config
for my smp machine
Dual Athlon-mp
40 gig ide hd
1024 Ram
xl0 nic device 100mbit fdx
machine i386
cpu I686_CPU
ident WEB1
# To statically compile in device wiring instead of /boot/device.hints
#hints "GENERIC.hints" # Default places to look for devices.
options SCHED_4BSD # 4BSD scheduler
options INET # InterNETworking
#options INET6 # IPv6 communications protocols
options FFS # Berkeley Fast Filesystem
options SOFTUPDATES # Enable FFS soft updates support
options UFS_ACL # Support for access control lists
options UFS_DIRHASH # Improve performance on big directories
options MD_ROOT # MD is a potential root device
#options NFSCLIENT # Network Filesystem Client
#options NFSSERVER # Network Filesystem Server
#options NFS_ROOT # NFS usable as /, requires NFSCLIENT
#options MSDOSFS # MSDOS Filesystem
options CD9660 # ISO 9660 Filesystem
options PROCFS # Process filesystem (requires PSEUDOFS)
options PSEUDOFS # Pseudo-filesystem framework
options GEOM_GPT # GUID Partition Tables.
options COMPAT_43 # Compatible with BSD 4.3 [KEEP THIS!]
options COMPAT_FREEBSD4 # Compatible with FreeBSD4
options SCSI_DELAY=15000 # Delay (in ms) before probing SCSI
options KTRACE # ktrace(1) support
options SYSVSHM # SYSV-style shared memory
options SYSVMSG # SYSV-style message queues
options SYSVSEM # SYSV-style semaphores
options _KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time extension
s
options KBD_INSTALL_CDEV # install a CDEV entry in /dev
#options AHC_REG_PRETTY_PRINT # Print register bitfields in debug
# output. Adds ~128k to driver.
#options AHD_REG_PRETTY_PRINT # Print register bitfields in debug
# output. Adds ~215k to driver.
options ADAPTIVE_GIANT # Giant mutex is adaptive.
device apic # I/O APIC
options SMP # SMP
# Bus support. Do not remove isa, even if you have no isa slots
device isa
device eisa
device pci
# Floppy drives
device fdc
# ATA and ATAPI devices
device ata
device atadisk # ATA disk drives
device ataraid # ATA RAID drives
device atapicd # ATAPI CDROM drives
device atapifd # ATAPI floppy drives
device atapist # ATAPI tape drives
options ATA_STATIC_ID # Static device numbering
# SCSI Controllers
#device ahb # EISA AHA1742 family
#device ahc # AHA2940 and onboard AIC7xxx devices
#device ahd # AHA39320/29320 and onboard AIC79xx devices
#device amd # AMD 53C974 (Tekram DC-390(T))
#device isp # Qlogic family
#device mpt # LSI-Logic MPT-Fusion
#device ncr # NCR/Symbios Logic
#device sym # NCR/Symbios Logic (newer chipsets + those of `
ncr')
#device trm # Tekram DC395U/UW/F DC315U adapters
#device adv # Advansys SCSI adapters
#device adw # Advansys wide SCSI adapters
#device aha # Adaptec 154x SCSI adapters
#device aic # Adaptec 15[012]x SCSI adapters, AIC-6[23]60.
#device bt # Buslogic/Mylex MultiMaster SCSI adapters
#device ncv # NCR 53C500
#device nsp # Workbit Ninja SCSI-3
#device stg # TMC 18C30/18C50
# SCSI peripherals
#device scbus # SCSI bus (required for SCSI)
#device ch # SCSI media changers
#device da # Direct Access (disks)
#device sa # Sequential Access (tape etc)
#device cd # CD
#device pass # Passthrough device (direct SCSI access)
#device ses # SCSI Environmental Services (and SAF-TE)
# RAID controllers interfaced to the SCSI subsystem
#device amr # AMI MegaRAID
#device asr # DPT SmartRAID V, VI and Adaptec SCSI RAID
#device ciss # Compaq Smart RAID 5*
#device dpt # DPT Smartcache III, IV - See NOTES for options
#device hptmv # Highpoint RocketRAID 182x
#device iir # Intel Integrated RAID
#device ips # IBM (Adaptec) ServeRAID
#device mly # Mylex AcceleRAID/eXtremeRAID
#device twa # 3ware 9000 series PATA/SATA RAID
# RAID controllers
#device aac # Adaptec FSA RAID
#device aacp # SCSI passthrough for aac (requires CAM)
#device ida # Compaq Smart RAID
#device mlx # Mylex DAC960 family
#device pst # Promise Supertrak SX6000
#device twe # 3ware ATA RAID
# atkbdc0 controls both the keyboard and the PS/2 mouse
device atkbdc # AT keyboard controller
device atkbd # AT keyboard
device psm # PS/2 mouse
device vga # VGA video card driver
#device splash # Splash screen and screen saver support
# syscons is the default console driver, resembling an SCO console
device sc
# Enable this for the pcvt (VT220 compatible) console driver
#device vt
#options XSERVER # support for X server on a vt console
#options FAT_CURSOR # start with block cursor
device agp # support several AGP chipsets
# Floating point support - do not disable.
device npx
# Power management support (see NOTES for more options)
#device apm
# Add suspend/resume support for the i8254.
device pmtimer
# PCCARD (PCMCIA) support
# PCMCIA and cardbus bridge support
device cbb # cardbus (yenta) bridge
device pccard # PC Card (16-bit) bus
device cardbus # CardBus (32-bit) bus
# Serial (COM) ports
device sio # 8250, 16[45]50 based serial ports
# Parallel port
device ppc
device ppbus # Parallel port bus (required)
device lpt # Printer
device plip # TCP/IP over parallel
device ppi # Parallel port interface device
#device vpo # Requires scbus and da
# If you've got a "dumb" serial or parallel PCI card that is
# supported by the puc(4) glue driver, uncomment the following
# line to enable it (connects to the sio and/or ppc drivers):
#device puc
# PCI Ethernet NICs.
#device de # DEC/Intel DC21x4x (``Tulip'')
#device em # Intel PRO/1000 adapter Gigabit Ethernet Card
#device ixgb # Intel PRO/10GbE Ethernet Card
#device txp # 3Com 3cR990 (``Typhoon'')
#device vx # 3Com 3c590, 3c595 (``Vortex'')
# PCI Ethernet NICs that use the common MII bus controller code.
# NOTE: Be sure to keep the 'device miibus' line in order to use these NICs!
device miibus # MII bus support
#device bfe # Broadcom BCM440x 10/100 Ethernet
#device bge # Broadcom BCM570xx Gigabit Ethernet
#device dc # DEC/Intel 21143 and various workalikes
#device fxp # Intel EtherExpress PRO/100B (82557, 82558)
#device lge # Level 1 LXT1001 gigabit ethernet
#device nge # NatSemi DP83820 gigabit ethernet
#device pcn # AMD Am79C97x PCI 10/100 (precedence over 'lnc'
)
#device re # RealTek 8139C+/8169/8169S/8110S
#device rl # RealTek 8129/8139
#device sf # Adaptec AIC-6915 (``Starfire'')
#device sis # Silicon Integrated Systems SiS 900/SiS 7016
#device sk # SysKonnect SK-984x & SK-982x gigabit Ethernet
#device ste # Sundance ST201 (D-Link DFE-550TX)
#device ti # Alteon Networks Tigon I/II gigabit Ethernet
#device tl # Texas Instruments ThunderLAN
#device tx # SMC EtherPower II (83c170 ``EPIC'')
#device vge # VIA VT612x gigabit ethernet
#device vr # VIA Rhine, Rhine II
#device wb # Winbond W89C840F
device xl # 3Com 3c90x (``Boomerang'', ``Cyclone'')
# ISA Ethernet NICs. pccard NICs included.
#device cs # Crystal Semiconductor CS89x0 NIC
# 'device ed' requires 'device miibus'
#device ed # NE[12]000, SMC Ultra, 3c503, DS8390 cards
#device ex # Intel EtherExpress Pro/10 and Pro/10+
#device ep # Etherlink III based cards
#device fe # Fujitsu MB8696x based cards
#device ie # EtherExpress 8/16, 3C507, StarLAN 10 etc.
#device lnc # NE2100, NE32-VL Lance Ethernet cards
#device sn # SMC's 9000 series of Ethernet chips
#device xe # Xircom pccard Ethernet
# ISA devices that use the old ISA shims
#device le
# Wireless NIC cards
#device wlan # 802.11 support
#device an # Aironet 4500/4800 802.11 wireless NICs.
#device awi # BayStack 660 and others
#device wi # WaveLAN/Intersil/Symbol 802.11 wireless NICs.
#device wl # Older non 802.11 Wavelan wireless NIC.
# Pseudo devices.
device loop # Network loopback
device mem # Memory and kernel memory devices
device io # I/O device
device random # Entropy device
device ether # Ethernet support
#device sl # Kernel SLIP
#device ppp # Kernel PPP
device tun # Packet tunnel.
device pty # Pseudo-ttys (telnet etc)
device md # Memory "disks"
device gif # IPv6 and IPv4 tunneling
device faith # IPv6-to-IPv4 relaying (translation)
device snp # snoop device
# The `bpf' device enables the Berkeley Packet Filter.
# Be aware of the administrative consequences of enabling this!
device bpf # Berkeley packet filter
# USB support
device uhci # UHCI PCI->USB interface
device ohci # OHCI PCI->USB interface
device usb # USB Bus (required)
#device udbp # USB Double Bulk Pipe devices
device ugen # Generic
device uhid # "Human Interface Devices"
device ukbd # Keyboard
#device ulpt # Printer
#device umass # Disks/Mass storage - Requires scbus and da
#device ums # Mouse
#device urio # Diamond Rio 500 MP3 player
#device uscanner # Scanners
# USB Ethernet, requires mii
#device aue # ADMtek USB Ethernet
#device axe # ASIX Electronics USB Ethernet
#device cue # CATC USB Ethernet
#device kue # Kawasaki LSI USB Ethernet
#device rue # RealTek RTL8150 USB Ethernet
# FireWire support
#device firewire # FireWire bus code
#device sbp # SCSI over FireWire (Requires scbus and da)
#device fwe # Ethernet over FireWire (non-standard!)
options IPFIREWALL #firewall
options IPFIREWALL_VERBOSE #enable logging to syslogd(8)
options IPFIREWALL_VERBOSE_LIMIT=50
options IPFIREWALL_DEFAULT_TO_ACCEPT #allow everything by default
options IPFIREWALL_FORWARD
options IPDIVERT
options IPSTEALTH #support for stealth forwarding
options DUMMYNET
options TCP_DROP_SYNFIN
#options PREEMPTION
options HZ=1000
options QUOTA
options ACCEPT_FILTER_DATA
options ACCEPT_FILTER_HTTP
and dmesg.boot
FreeBSD 5.3-RELEASE-p5 #1: Sat Jan 22 02:43:33 UTC 2005
root@web1.hostingfreak.net:/usr/obj/usr/src/sys/WEB1
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: AMD Athlon(TM) MP 2000+ (1666.73-MHz 686-class CPU)
Origin = "AuthenticAMD" Id = 0x662 Stepping = 2
Features=0x383fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CM
OV,PAT,PSE36,MMX,FXSR,SSE>
AMD Features=0xc0480000<MP,AMIE,DSP,3DNow!>
real memory = 1073741824 (1024 MB)
avail memory = 1045397504 (996 MB)
MPTable: <ASUS PROD00000000>
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
cpu0 (BSP): APIC ID: 0
cpu1 (AP): APIC ID: 1
ioapic0: Assuming intbase of 0
ioapic0 <Version 1.1> irqs 0-23 on motherboard
npx0: [FAST]
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <MPTable Host-PCI bridge> pcibus 0 on motherboard
pci0: <PCI bus> on pcib0
agp0: <AMD 762 host to AGP bridge> port 0xe800-0xe803 mem 0xfb800000-0xfb800fff,
0xfc000000-0xfdffffff at device 0.0 on pci0
pcib1: <MPTable PCI-PCI bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci1: <display, VGA> at device 5.0 (no driver attached)
isab0: <PCI-ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <AMD 768 UDMA100 controller> port 0xd800-0xd80f,0x376,0x170-0x177,0x3f6
,0x1f0-0x1f7 at device 7.1 on pci0
ata0: channel #0 on atapci0
ata1: channel #1 on atapci0
pci0: <bridge, PCI-unknown> at device 7.3 (no driver attached)
xl0: <3Com 3c905C-TX Fast Etherlink XL> port 0xd400-0xd47f mem 0xf8000000-0xf800
007f irq 16 at device 8.0 on pci0
miibus0: <MII bus> on xl0
ukphy0: <Generic IEEE 802.3u media interface> on miibus0
ukphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
xl0: Ethernet address: 00:e0:18:da:fa:c1
pcib2: <MPTable PCI-PCI bridge> at device 16.0 on pci0
pci2: <PCI bus> on pcib2
cpu0 on motherboard
cpu1 on motherboard
orm0: <ISA Option ROM> at iomem 0xc0000-0xc7fff on isa0
pmtimer0 on isa0
atkbdc0: <Keyboard controller (i8042)> at port 0x64,0x60 on isa0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
ppc0: parallel port not found.
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
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
unknown: <PNP0303> can't assign resources (port)
Timecounters tick every 1.000 msec
ipfw2 initialized, divert enabled, rule-based forwarding enabled, default to acc
ept, logging limited to 50 packets/entry by default
ad0: 39083MB <Maxtor 5T040H4/TAH71DP0> [79408/16/63] at ata0-master UDMA100
acd0: CDROM <GCR-8521B/1.00> at ata1-master PIO4
SMP: AP CPU #1 Launched!
Mounting root from ufs:/dev/ad0s1a
Only thing that concerns me with my config is I see no "SMP: AP CPU #2
Launched!" is this normal for a 2 cpu machine? The box is stable.
4:48AM up 4 days, 26 mins, 2 users, load averages: 0.00, 0.01, 0.00
5.3-RELEASE-p5
Chris
On Mon, 24 Jan 2005 15:26:42 +0300, Artem Kuchin <matrix@itlegion.ru> wrote:
>
> > On Sun, 23 Jan 2005, Artem Kuchin wrote:
> >
> >> > On Sat, 22 Jan 2005, Artem Kuchin wrote:
> >> >
> >> >> I cvssed just an hour ago. 5.3-STABLE and cannot build kernel with
> >> >> WITNES. It complains:
> >> >
> >> > This occurs when building WITNESS without DDB in the kernel, which was not
> >> > a tested build case when I added "show alllocks", and apparently is a
> >> > relatively uncommon configuration as you're the first person to bump into
> >> > it. I've just committed the fix as subr_witness.c:1.187 in HEAD, and
> >> > subr_witness.c:1.178.2.4 in RELENG_5. Please let me know if this doesn't
> >> > fix the problem for you.
> >>
> >> It fixed the problem. I am actually stuggling with unpredictable weird
> >> lock ups, when the host can be pinged but i cannot connect via
> >> ssh/telnet or httpd or anything else. It happens w/o any visible reason.
> >> I am running several jails with mysql and apache in each and canot make
> >> the whole system stable yet.
> >
> > This is typically a sign of one of two problems:
> >
> > - The system is live locked due to very high load, so the ithread,
> > netisrs, etc, in the kernel run fine, but user processes don't get a
> > chance to run.
> >
> > - The system is dead locked due to user space processes getting wedged on
> > common locks, but the kernel ithreads and netisrs can keep on
> > responding.
> >
> > I generally assume that it's a deadlock as opposed to a live lock. I'd
> > compile a kernel with DDB, KDB, WITNESS, and BREAK_TO_DEBUGGER. When the
> > system appears to wedge, break into the debugger using a console or serial
> > break (FYI: serial break is more reliable, and you get the benefit of
> > being able to easily copy and paste debugging output using the serial
> > console for DDB). Use "show alllocks" and "show lockedvnods" to examine
> > most of the system's locking state. Changes are, either all the
> > interesting processes are stacked up on VFS or VM locks, since those kinds
> > of deadlocks produce the exact symptoms you describe: ping works fine
> > because it only hits the netisr, but when you open TCP connections, the
> > sshd (etc) block on VM or VFS locks attempting to fork new children or
> > access a file in the file system name space. At first, the TCP
> > connections will establish but there will be no application data; after a
> > bit, they will not even return a SYN/ACK because the listen queue for the
> > listen socket has filled.
> >
>
> Well, i cvsed and reconpiled the kernel with WITNESS, INVARINATS, turned off
> adaptive giant and got a lock today at 7 am. Since the server is remotely controlled
> i took my digital camera because i cannot connect serial console to it and went to the server.
> I expetced to see some special message about something going wrong, break
> into debugger (CTRL+ALT+ESC) and to take some pictures of dumps of console.
> But, i saw nothing. The lasrt message on th screen was about ssh loging last evening
> and the last message in /var/log/all.log was about entropy save from cron.
> I could not break into debugger usinmg CTRL-ALT+ESC. I did nothing. So,
> it looked like a hard lock.
>
> At this point i would like to tell the whole story.
> We bought this server in may 2004 and decided to extemsively test the hardware
> while there were not 5.3. We actually expected it around august. SO, we installed
> 5-CURRENT and ran high load tests (cpu, memory, disk storage, network) from
> /usr/ports/benchmark at the same time and one-by-one several weeks. There were
> not a glitch. After that we turned it off and waited for RELEASE. RELEASE has
> come and we begun to setup the servre as it should work. As the server's
> primary mission is to host a buch of site we decided to setup jails for each site,
> So we did in december and put the server on prividers co-location severals
> kilometer away from the office. Next day the server locked up. We were surprised
> but just rebooted it, It locked up the next day gain. We cvsupped and rebuild the
> system and the jails. The server locked up the next day. During the new year break
> i have figureed that if there are more that one jail running the server locks withun
> 24 hours with very hight probablity and within 48 hours with 100% probability. I
> wrote into freebsd-stable about it. You have asked for debugger dump (pcpu, list of
> lock, e.t.c). I could not do it at that time, so, i did not reply and just cvsupped in
> the beginning of january and rebuilt the system and the jails again. Magically, after
> that i could run 5 jails (did not tried more) for over a week and i already decided that
> the bug was fixed and I could host the site. Alas, the next glitch did not wait to long.
> After a few more days i saw a srange situatuon - i could not connect to server using
> SSH. SSH replied about auth key or something like that. I rebootied the system and
> ssh worked fine. Still have no idea what that was, but i setuo IPFIREWALL and a telnet
> server for accept connection only from one ip address, so, if ssh fails I could use telnet.
> After that i moved a real site with perl scripts, 1GB database, mail account (using qmail+vpopmail)
> into one of the jails and the next day got the next problem: I could ping server, but could not
> connect using ssh, www, telnet (110,25,23). I tried to recompile the kernel with INVARINATS,
> WITNESS and disable the adaptive giant. I could not, so I wrote about it to you. You fixed
> the source and now i recompliled the source again and today got a lock again with all those
> options enabled and this time i could not ping the server.
> I could thing that there is semething wrong with the hardware, but it passed
> many days of testing. Anyway, my current idea are
>
> 1) Something wrong with jail code
> 2) Something wrong with SMP code
> 3) Something wrong with HYPERTHREADING code
> 4) Something wrong with Memory disk code (md device, which i use)
> 5) Something wrong with the hardware
>
> So, today, i opened bios, truned off hyperthreaading, fast strinmg operations and
> all other 'more advanced' features in the bios. Turned off IDE controller the motherboard.
> This rule out HYPERTHREADING code problem and somewaht hardware problem.
>
> I turned off MD usage (not more memory disk, but actually i need it very badly).
> So i rule out the md code problem.
>
> Now, i will run some web access test (simulation of browsing for a week). It the
> sever does not lock up, i will consider that i have found a workaround for some
> hidden bug and the bug is somewere in md, ht code or hardware.
>
> If it locks up again the i will giveup jails and try for one more week. If it does not
> lock up - jail code is the problem.
>
> If it locks up without jails, then i will turn off SMP and try again.
>
> If it locks up without nothing, then hardware if faulty and will have futher
> choice of hanging myself or shooting in the head.
>
> I would like to see your and others' comments on the story and i have one
> more question: what does options _KPOSIX_PRIORITY_SCHEDULING
> do? May it be somehow related to the problem?
>
> The hardware is:
>
> MB dual xeon Supermicro X5DPE-G2
> CPU P4 XEON 2,667Ghz 512Kb cache 533mhz socket 604
> 2 Gb 266Mhz, DDR, ECC, Reg, 1GB dimm
> 4 HDDs 120Gb (seagate baracuda 7200.7)
> 3Ware Escalade 8506-4LP
> Case Supermicro SC822T-550LP
> Slim DVD/CD-RW Toshiba SD-R2412B IDE (OEM)
>
> The todays kernel CONFIG wich got locked:
>
> machine i386
> cpu I486_CPU
> cpu I586_CPU
> cpu I686_CPU
> ident OMNI2
>
> options SMP
>
> options QUOTA
>
> options SCHED_4BSD # 4BSD scheduler
> options INET # InterNETworking
> options INET6 # IPv6 communications protocols
> options FFS # Berkeley Fast Filesystem
> options SOFTUPDATES # Enable FFS soft updates support
> options UFS_ACL # Support for access control lists
> options UFS_DIRHASH # Improve performance on big directories
> #options MD_ROOT # MD is a potential root device
> #options NFSCLIENT # Network Filesystem Client
> #options NFSSERVER # Network Filesystem Server
> #options NFS_ROOT # NFS usable as /, requires NFSCLIENT
> options MSDOSFS # MSDOS Filesystem
> options CD9660 # ISO 9660 Filesystem
> options PROCFS # Process filesystem (requires PSEUDOFS)
> options PSEUDOFS # Pseudo-filesystem framework
> options GEOM_GPT # GUID Partition Tables.
> options COMPAT_43 # Compatible with BSD 4.3 [KEEP THIS!]
> options COMPAT_FREEBSD4 # Compatible with FreeBSD4
> #options SCSI_DELAY=15000 # Delay (in ms) before probing SCSI
> options KTRACE # ktrace(1) support
> options SYSVSHM # SYSV-style shared memory
> options SYSVMSG # SYSV-style message queues
> options SYSVSEM # SYSV-style semaphores
> options _KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time extensions
> #options KBD_INSTALL_CDEV # install a CDEV entry in /dev
>
> device apic # I/O APIC
>
> # Bus support. Do not remove isa, even if you have no isa slots
> device isa
> device pci
>
> # Floppy drives
> device fdc
>
> # ATA and ATAPI devices
> device ata
> device atadisk # ATA disk drives
> device ataraid # ATA RAID drives
> device atapicd # ATAPI CDROM drives
> #device atapifd # ATAPI floppy drives
> #device atapist # ATAPI tape drives
> options ATA_STATIC_ID # Static device numbering
>
> # SCSI peripherals
> device scbus # SCSI bus (required for SCSI)
> device da # Direct Access (disks)
> device pass # Passthrough device (direct SCSI access)
> device twe # 3ware ATA RAID
>
> # atkbdc0 controls both the keyboard and the PS/2 mouse
> device atkbdc # AT keyboard controller
> device atkbd # AT keyboard
> device psm # PS/2 mouse
>
> device vga # VGA video card driver
>
> device splash # Splash screen and screen saver support
>
> # syscons is the default console driver, resembling an SCO console
> device sc
>
> device agp # support several AGP chipsets
>
> # Floating point support - do not disable.
> device npx
>
> # Power management support (see NOTES for more options)
> #device apm
> # Add suspend/resume support for the i8254.
> #device pmtimer
>
> # Serial (COM) ports
> device sio # 8250, 16[45]50 based serial ports
>
> # Parallel port
> device ppc
> device ppbus # Parallel port bus (required)
> device lpt # Printer
> device ppi # Parallel port interface device
> #device vpo # Requires scbus and da
>
> device miibus # MII bus support
> device fxp # Intel EtherExpress PRO/100B (82557, 82558)
> device em
>
> device loop # Network loopback
> device mem # Memory and kernel memory devices
> device io # I/O device
> device random # Entropy device
> device ether # Ethernet support
> #device sl # Kernel SLIP
> #device ppp # Kernel PPP
> device tun # Packet tunnel.
> device pty # Pseudo-ttys (telnet etc)
> device md # Memory "disks"
> #device gif # IPv6 and IPv4 tunneling
> #device faith # IPv6-to-IPv4 relaying (translation)
>
> device bpf # Berkeley packet filter
> # USB support
> device uhci # UHCI PCI->USB interface
> device ohci # OHCI PCI->USB interface
> device usb # USB Bus (required)
> #device udbp # USB Double Bulk Pipe devices
> device ugen # Generic
> device uhid # "Human Interface Devices"
> device ulpt # Printer
> device umass # Disks/Mass storage - Requires scbus and da
>
> # FireWire support
> device firewire # FireWire bus code
> #device sbp # SCSI over FireWire (Requires scbus and da)
> #device fwe # Ethernet over FireWire (non-standard!)
>
> options IPFIREWALL
> options IPFIREWALL_VERBOSE
> options IPFIREWALL_VERBOSE_LIMIT=10000
> options IPFIREWALL_DEFAULT_TO_ACCEPT
>
> device snp
> device speaker
>
> options DDB
> options KDB
> options BREAK_TO_DEBUGGER
> options INVARIANT_SUPPORT
> options INVARIANTS
> options WITNESS
> options WITNESS_KDB
> options WITNESS_SKIPSPIN
> #options ADAPTIVE_GIANT # Giant mutex is adaptive.
>
> DMESG (the config which got locked):
>
> Copyright (c) 1992-2005 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 5.3-STABLE #3: Sun Jan 23 01:04:00 MSK 2005
> matrix@omni2.itlegion.ru:/usr/obj/usr/src/sys/OMNI2
> WARNING: WITNESS option enabled, expect reduced performance.
> Timecounter "i8254" frequency 1193182 Hz quality 0
> CPU: Intel(R) Xeon(TM) CPU 2.66GHz (2665.93-MHz 686-class CPU)
> Origin = "GenuineIntel" Id = 0xf25 Stepping = 5
> 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,S
> SE2,SS,HTT,TM,PBE>
> Hyperthreading: 2 logical CPUs
> real memory = 4160225280 (3967 MB)
> avail memory = 4077486080 (3888 MB)
> ACPI APIC Table: <PTLTD APIC >
> FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
> cpu0 (BSP): APIC ID: 0
> cpu1 (AP): APIC ID: 1
> cpu2 (AP): APIC ID: 6
> cpu3 (AP): APIC ID: 7
> ioapic0 <Version 2.0> irqs 0-23 on motherboard
> ioapic1 <Version 2.0> irqs 24-47 on motherboard
> ioapic2 <Version 2.0> irqs 48-71 on motherboard
> ioapic3 <Version 2.0> irqs 72-95 on motherboard
> ioapic4 <Version 2.0> irqs 96-119 on motherboard
> npx0: [FAST]
> npx0: <math processor> on motherboard
> npx0: INT 16 interface
> acpi0: <PTLTD RSDT> on motherboard
> acpi0: Power Button (fixed)
> Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
> acpi_timer0: <24-bit timer at 3.579545MHz> port 0x1008-0x100b on acpi0
> cpu0: <ACPI CPU (2 Cx states)> on acpi0
> cpu1: <ACPI CPU (2 Cx states)> on acpi0
> cpu2: <ACPI CPU (2 Cx states)> on acpi0
> cpu3: <ACPI CPU (2 Cx states)> on acpi0
> pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
> pci0: <ACPI PCI bus> on pcib0
> pci0: <unknown> at device 0.1 (no driver attached)
> pcib1: <ACPI PCI-PCI bridge> at device 2.0 on pci0
> pci1: <ACPI PCI bus> on pcib1
> pci1: <base peripheral, interrupt controller> at device 28.0 (no driver attached)
> pcib2: <ACPI PCI-PCI bridge> at device 29.0 on pci1
> pci2: <ACPI PCI bus> on pcib2
> pci1: <base peripheral, interrupt controller> at device 30.0 (no driver attached)
> pcib3: <ACPI PCI-PCI bridge> at device 31.0 on pci1
> pci3: <ACPI PCI bus> on pcib3
> em0: <Intel(R) PRO/1000 Network Connection, Version - 1.7.35> port 0x3000-0x303f mem 0xfc200000-0xfc21ffff irq 28 at device 2
> .0 on pci3
> em0: Ethernet address: 00:30:48:2a:2d:bc
> em0: Speed:N/A Duplex:N/A
> em1: <Intel(R) PRO/1000 Network Connection, Version - 1.7.35> port 0x3040-0x307f mem 0xfc220000-0xfc23ffff irq 29 at device 2
> .1 on pci3
> em1: Ethernet address: 00:30:48:2a:2d:bd
> em1: Speed:N/A Duplex:N/A
> pcib4: <ACPI PCI-PCI bridge> at device 3.0 on pci0
> pci4: <ACPI PCI bus> on pcib4
> pci4: <base peripheral, interrupt controller> at device 28.0 (no driver attached)
> pcib5: <ACPI PCI-PCI bridge> at device 29.0 on pci4
> pci5: <ACPI PCI bus> on pcib5
> pci4: <base peripheral, interrupt controller> at device 30.0 (no driver attached)
> pcib6: <ACPI PCI-PCI bridge> at device 31.0 on pci4
> pci6: <ACPI PCI bus> on pcib6
> twe0: <3ware Storage Controller. Driver version 1.50.01.002> port 0x4000-0x400f mem 0xfc800000-0xfcffffff irq 72 at device 1.
> 0 on pci6
> twe0: [GIANT-LOCKED]
> twe0: 4 ports, Firmware FE7S 1.05.00.063, BIOS BE7X 1.08.00.048
> uhci0: <Intel 82801CA/CAM (ICH3) USB controller USB-A> port 0x2000-0x201f irq 16 at device 29.0 on pci0
> uhci0: [GIANT-LOCKED]
> usb0: <Intel 82801CA/CAM (ICH3) 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
> uhub0: 2 ports with 2 removable, self powered
> uhci1: <Intel 82801CA/CAM (ICH3) USB controller USB-B> port 0x2020-0x203f irq 19 at device 29.1 on pci0
> uhci1: [GIANT-LOCKED]
> usb1: <Intel 82801CA/CAM (ICH3) 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
> uhub1: 2 ports with 2 removable, self powered
> uhci2: <Intel 82801CA/CAM (ICH3) USB controller USB-C> port 0x2040-0x205f irq 18 at device 29.2 on pci0
> uhci2: [GIANT-LOCKED]
> usb2: <Intel 82801CA/CAM (ICH3) 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
> uhub2: 2 ports with 2 removable, self powered
> pcib7: <ACPI PCI-PCI bridge> at device 30.0 on pci0
> pci7: <ACPI PCI bus> on pcib7
> pci7: <display, VGA> at device 1.0 (no driver attached)
> isab0: <PCI-ISA bridge> at device 31.0 on pci0
> isa0: <ISA bus> on isab0
> atapci0: <Intel ICH3 UDMA100 controller> port 0x2060-0x206f,0x3f6,0x1f0-0x1f7 at device 31.1 on pci0
> ata0: channel #0 on atapci0
> ata2: channel #1 on atapci0
> pci0: <serial bus, SMBus> at device 31.3 (no driver attached)
> acpi_button0: <Power Button> on acpi0
> speaker0: <PC speaker> port 0x61 on acpi0
> atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60 irq 1 on acpi0
> atkbd0: <AT Keyboard> irq 1 on atkbdc0
> atkbd0: [GIANT-LOCKED]
> sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
> sio0: type 16550A
> sio1: <16550A-compatible COM port> port 0x2f8-0x2ff irq 3 on acpi0
> sio1: type 16550A
> fdc0: <floppy drive controller> port 0x3f7,0x3f0-0x3f5 irq 6 drq 2 on acpi0
> fdc0: [FAST]
> fd0: <1440-KB 3.5" drive> on fdc0 drive 0
> orm0: <ISA Option ROMs> at iomem 0xe0000-0xe3fff,0xc9000-0xc9fff,0xc8000-0xc8fff,0xc0000-0xc7fff 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 10.000 msec
> ipfw2 initialized, divert disabled, rule-based forwarding disabled, default to accept, logging limited to 10000 packets/entry
> by default
> acd0: CDRW <TOSHIBA DVD-ROM SD-R2412/1015> at ata0-slave UDMA33
> twed0: <Unit 0, RAID5, Normal> on twe0
> twed0: 343417MB (703318656 sectors)
> SMP: AP CPU #2 Launched!
> SMP: AP CPU #1 Launched!
> SMP: AP CPU #3 Launched!
> Mounting root from ufs:/dev/twed0s1a
> em0: Link is up 100 Mbps Full Duplex
>
> _______________________________________________
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