FreeBSD 6.2-STABLE crash under moderate disk activity

Alex Povolotsky tarkhil at
Wed Aug 1 13:46:29 PDT 2007

FreeBSD 6.2-RELEASE and 6.2-STABLE both repeatedly crash with moderate 
disk activity. The problem occurs with two different disk drives, 
controller documented as supported. When disk is empty, everything 
works; filling disk with data makes crash inevietable.

Here is my backtrace

Unread portion of the kernel message buffer:
completing request directly
ad6: TIMEOUT - WRITE_DMA retrying (1 retry left) LBA=18829695

Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x28
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc0695b74
stack pointer           = 0x28:0xd568ec28
frame pointer           = 0x28:0xd568ec30
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 18 (thread taskq)
trap number             = 12
panic: page fault
Uptime: 38m41s
Dumping 511 MB (2 chunks)
  chunk 0: 1MB (160 pages) ... ok
  chunk 1: 511MB (130800 pages) 495 479 463 447 431 415 399 383 367 351 
335 319 303 287 271 255 239 223 207 191 175 159 143 127 111 95 79 63 47 
31 15

#0  doadump () at pcpu.h:165
165     pcpu.h: No such file or directory.
        in pcpu.h
(kgdb) bt
#0  doadump () at pcpu.h:165
#1  0xc06827ea in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:409
#2  0xc0682a80 in panic (fmt=0xc08f6895 "%s") at 
#3  0xc08985f4 in trap_fatal (frame=0xd568ebe8, eva=40) at 
#4  0xc089835b in trap_pfault (frame=0xd568ebe8, usermode=0, eva=40)
    at /usr/src/sys/i386/i386/trap.c:745
#5  0xc0897f99 in trap (frame=
      {tf_fs = -1064435704, tf_es = -714604504, tf_ds = -1064239064, 
tf_edi = -1004877952, tf_esi = 0, tf_ebp = -714544080, tf_isp = 
-714544108, tf_ebx = -1004877952, tf_edx = 2, tf_ecx = -1019514112, 
tf_eax = 0, tf_trapno = 12, tf_err = 0, tf_eip = -1066837132, tf_cs = 
32, tf_eflags = 590406, tf_esp = -1004877952, tf_ss = 0}) at 
#6  0xc08856ca in calltrap () at /usr/src/sys/i386/i386/exception.s:139
#7  0xc0695b74 in devclass_sysctl_init (dc=0x0) at 
#8  0xc0695cf0 in device_sysctl_init (dev=0xc41ac780) at 
#9  0xc0697b7a in device_attach (dev=0xc41ac780) at 
#10 0xc0697b64 in device_probe_and_attach (dev=0xc41ac780)
    at /usr/src/sys/kern/subr_bus.c:2346
#11 0xc069844a in bus_generic_attach (dev=0x0) at 
#12 0xc04c6814 in ata_identify (dev=0xc3404080) at 
#13 0xc04c7462 in ata_sata_phy_event (context=0xc3cc6de0, dummy=1)
    at /usr/src/sys/dev/ata/ata-chipset.c:273
#14 0xc06a1e9b in taskqueue_run (queue=0xc3301d00) at 
#15 0xc06a22d6 in taskqueue_thread_loop (arg=0x0) at 
#16 0xc066c9d4 in fork_exit (callout=0xc06a2268 <taskqueue_thread_loop>, 
    frame=0xd568ed38) at /usr/src/sys/kern/kern_fork.c:830
#17 0xc088572c in fork_trampoline () at 


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        The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 6.2-STABLE #0: Thu Jul 26 10:27:14 MSD 2007
    root at
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Pentium(R) 4 CPU 2.40GHz (2411.60-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0xf24  Stepping = 4
real memory  = 536805376 (511 MB)
avail memory = 515887104 (491 MB)
ioapic0 <Version 2.0> irqs 0-23 on motherboard
kbd1 at kbdmux0
ath_hal: (AR5210, AR5211, AR5212, RF5111, RF5112, RF2413, RF5413)
acpi0: <GBT AWRDACPI> on motherboard
acpi0: Power Button (fixed)
cpu0: <ACPI CPU> on acpi0
acpi_button0: <Power Button> on acpi0
acpi_button1: <Sleep Button> on acpi0
pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff,0x4000-0x40bf on acpi0
pci0: <ACPI PCI bus> on pcib0
agp0: <Intel 82845G host to AGP bridge> mem 0xd0000000-0xd7ffffff at 
device 0.0 on pci0
pcib1: <PCI-PCI bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci1: <display, VGA> at device 0.0 (no driver attached)
uhci0: <Intel 82801DB (ICH4) USB controller USB-A> port 0xb800-0xb81f 
irq 16 at device 29.0 on pci0
usb0: <Intel 82801DB (ICH4) 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 82801DB (ICH4) USB controller USB-B> port 0xb000-0xb01f 
irq 19 at device 29.1 on pci0
usb1: <Intel 82801DB (ICH4) 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 82801DB (ICH4) USB controller USB-C> port 0xb400-0xb41f 
irq 18 at device 29.2 on pci0
usb2: <Intel 82801DB (ICH4) 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
ehci0: <Intel 82801DB/L/M (ICH4) USB 2.0 controller> mem 
0xe4000000-0xe40003ff irq 23 at device 29.7 on pci0
usb3: EHCI version 1.0
usb3: companion controllers, 2 ports each: usb0 usb1 usb2
usb3: <Intel 82801DB/L/M (ICH4) 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
uhub3: 6 ports with 6 removable, self powered
pcib2: <ACPI PCI-PCI bridge> at device 30.0 on pci0
pci2: <ACPI PCI bus> on pcib2
rl0: <RealTek 8139 10/100BaseTX> port 0x9000-0x90ff mem 
0xe3000000-0xe30000ff irq 22 at device 2.0 on pci2
miibus0: <MII bus> on rl0
rlphy0: <RealTek internal media interface> on miibus0
rlphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
rl0: Ethernet address: 00:50:22:82:db:6c
atapci0: <SiI 3512 SATA150 controller> port 
mem 0xe3001000-0xe
30011ff irq 18 at device 4.0 on pci2
ata2: <ATA channel 0> on atapci0
ata3: <ATA channel 1> on atapci0
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
atapci1: <Intel ICH4 UDMA100 controller> port 
0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xf000-0xf00f at device 31.1 on pci0
ata0: <ATA channel 0> on atapci1
ata1: <ATA channel 1> on atapci1
pci0: <serial bus, SMBus> at device 31.3 (no driver attached)
pci0: <multimedia, audio> at device 31.5 (no driver attached)
fdc0: <floppy drive controller> port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on acpi0
fdc0: [FAST]
sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on 
sio0: type 16550A
sio1: <16550A-compatible COM port> port 0x2f8-0x2ff irq 3 on acpi0
sio1: type 16550A
ppc0: <Standard parallel printer port> port 0x378-0x37f irq 7 on acpi0
ppc0: Generic chipset (NIBBLE-only) in COMPATIBLE mode
ppbus0: <Parallel port bus> on ppc0
plip0: <PLIP network interface> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
pmtimer0 on isa0
orm0: <ISA Option ROM> at iomem 0xcc000-0xd07ff 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
Timecounter "TSC" frequency 2411602732 Hz quality 800
Timecounters tick every 1.000 msec
ad0: 38166MB <MAXTOR STM3402111A 3.AAJ> at ata0-master UDMA100
ad6: 476940MB <Seagate ST3500630NS 3.AEG> at ata3-master SATA150


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