Date: Mon, 19 Feb 2001 12:42:11 +0100 From: Farid Hajji <farid.hajji@ob.kamp.net> To: current@freebsd.org Subject: Kernel panic while dumping (even in single user mode). Message-ID: <200102191142.f1JBgBD20663@mail-ob.kamp.net>
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Hi,
the kernel panics while dump(8)ing /usr, even in single user mode.
This is what DDB says:
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0xffffffff
fault code = supervisor read, page not present
instruction pointer = 0x8:0xffffffff
stack pointer = 0x10:0xc86ebcc0
frame pointer = 0x10:0xc86ebd5c
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 = 46 (dump)
kernel: type 12 trap, code = 0
Stopped at -0x1:
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0xffffffff
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc02745ec
stack pointer = 0x10:0xc86ebb28
frame pointer = 0x10:0xc86ebb2c
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 = 46 (dump)
kernel: type 12 trap, code = 0
Stopped at -0x1:
This is my kernel config:
# MYTWR: Farid's Machine running FreeBSD-5.0 CURRENT
# $Id: MYTWR,v 2.5 2001/02/19 09:43:30 root Exp $
machine i386
cpu I586_CPU
ident MYTWR
maxusers 32
#makeoptions DEBUG=-g #Build kernel with gdb(1) debug symbols
options DDB #Enable kernel debugger.
options MAXMEM="(128*1024)"
options MAXDSIZ="(256*1024*1024)" # Allow max. 256 MB of Virtual RAM
options DFLDSIZ="(128*1024*1024)" # Can be user-changed up to MAXDSIZ
# strings -n 3 /kernel | sed -n 's/^___//p' > MYTWR.from.kernel
options INCLUDE_CONFIG_FILE #Include this file in kerneLl
options INET #InterNETworking
options FFS #Berkeley Fast Filesystem
options SOFTUPDATES #Enables FFS soft updates support
#options MFS #Memory Filesystem
#options MD_ROOT #MD is a potential root device
options NFS #Network Filesystem
#options NFS_ROOT #NFS usable as root device, NFS required
# The following are optional (loaded when needed)
#options MSDOSFS #MSDOS Filesystem
#options CD9660 #ISO 9660 Filesystem
#options DEVFS #Device Filesystem
#options PROCFS #Process filesystem
options COMPAT_43 #Compatible with BSD 4.3 [KEEP THIS!]
options SCSI_DELAY=8000 #Delay (in ms) before probing SCSI
options UCONSOLE #Allow users to grab the console
options USERCONFIG #boot -c editor
options VISUAL_USERCONFIG #visual boot -c editor
#options KTRACE #Needed by SvrV4 Emulator (slower)
options SYSVSHM #SYSV-style shared memory
options SYSVMSG #SYSV-style message queues
options SYSVSEM #SYSV-style semaphores
options P1003_1B #Posix P1003_1B real-time extensions
options _KPOSIX_PRIORITY_SCHEDULING
options KBD_INSTALL_CDEV # install a CDEV entry in /dev
device isa
device eisa
device pci
# Floppy drives
device fdc # Floppy Device Controller
# ATA and ATAPI devices
device ata
device atadisk # ATA disk drives
device atapicd # ATAPI CDROM drives
device atapifd # ATAPI floppy drives
device atapist # ATAPI tape drives
options ATA_STATIC_ID #Static device numbering
#options ATA_ENABLE_ATAPI_DMA #Enable DMA on ATAPI devices
# SCSI Controllers
device ahc # AHA2940 and onboard AIC7xxx devices
# SCSI peripherals
device scbus # SCSI bus (required)
device da # Direct Access (disks)
device sa # Sequential Access (tape etc)
device cd # CD
device pass # Passthrough device (direct SCSI access)
# atkbdc0 controls both the keyboard and the PS/2 mouse
device atkbdc 1 # Keyboard and PS/2 mouse
device atkbd # The AT-Keyboard.
device vga # Video driver.
#options VESA # Support for VESA Video Modes
# splash screen/screen saver
device splash
# syscons is the default console driver, resembling an SCO console
device sc 1
options MAXCONS=10 # Maximum number of virtual consoles
options SC_NORM_ATTR="(FG_GREEN|BG_BLACK)"
options SC_NORM_REV_ATTR="(FG_YELLOW|BG_GREEN)"
options SC_KERNEL_CONS_ATTR="(FG_RED|BG_BLACK)"
options SC_KERNEL_CONS_REV_ATTR="(FG_BLACK|BG_RED)"
# Floating point support - do not disable.
device npx #Mandatory, don't remove!
# Sound-Support with Luigi's code:
device sbc # Soundblaster Bridge-Code to pcm
device pcm # PnP/PCI Sound Cards
#device midi # Midi interfaces
#device seq # Sequencer
# Serial (COM) ports
device sio #Serial Devices
# Parallel port
device ppc # ISA-Bus parallel port interface
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
# ISA Ethernet NICs.
device ed # SMC Ultra, settings in /boot/hints
# Pseudo devices - the number indicates how many units to allocated.
device random # Random Entropy Pool.
device loop # Network loopback
device ether # Ethernet support
device tun # Packet tunnel.
device pty # Pseudo-ttys (telnet etc)
#device md # Memory "disks"
device bpf # Berkeley packet filter
# NOTE: vn is depracated, used md instead.
#device vn # VNode driver (turns a file into a device)
# ----
options USER_LDT #allow user-level control of i386 ldt
options ROOTDEVNAME=\"ufs:da0s1a\"
options EXT2FS #Linux ext2 filesystem
options ENABLE_VFS_IOOPT #vfs.ioopt=0(noopt),1(normal),2(aggr.)
options _KPOSIX_VERSION=199309L
# This is only needed for PPPoE (more NETGRAPH_* options in NOTES)
#options NETGRAPH #netgraph(4) system
#options NETGRAPH_PPP
#options NETGRAPH_PPPOE
# The following options are _dangerous_ (but work on my hardware)
#options AUTO_EOI_1
#options AUTO_EOI_2 # <- This is especially DANGEROUS!
#options AHC_ALLOW_MEMIO # aic7xxx memory mapped i/o
And this is dmesg output:
farid@bsdevil:~> /sbin/dmesg
Copyright (c) 1992-2001 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 5.0-CURRENT #0: Mon Feb 19 11:21:32 CET 2001
root@bsdevil.meta.net:/usr/obj/usr/src/sys/MYTWR
Timecounter "i8254" frequency 1193182 Hz
Timecounter "TSC" frequency 199432836 Hz
CPU: Pentium/P54C (199.43-MHz 586-class CPU)
Origin = "GenuineIntel" Id = 0x52c Stepping = 12
Features=0x1bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8>
real memory = 134217728 (131072K bytes)
config> di psm0
config> di sn0
config> di lnc0
config> di le0
config> di ie0
config> di fe0
config> di cs0
config> di bt0
config> di aic0
config> di aha0
config> di adv0
config> en ed0
config> po ed0 0x300
config> ir ed0 11
config> iom ed0 0xc8000
config> f ed0 0
config> q
avail memory = 126947328 (123972K bytes)
Preloaded elf kernel "kernel" at 0xc039e000.
Preloaded userconfig_script "/boot/kernel.conf" at 0xc039e09c.
Intel Pentium detected, installing workaround for F00F bug
WARNING: size of kinfo_proc (648) should be 644!!!
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Host to PCI bridge> at pcibus 0 on motherboard
pci0: <PCI bus> on pcib0
isab0: <PCI-ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <Intel PIIX3 ATA controller> port 0xe800-0xe80f at device 7.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
pci0: <display, VGA> at 9.0 (no driver attached)
ahc0: <Adaptec 2940 Ultra SCSI adapter> port 0xe000-0xe0ff mem 0xfa000000-0xfa000fff irq 12 at device 10.0 on pci0
aic7880: Wide Channel A, SCSI Id=7, 16/255 SCBs
isa0: unexpected small tag 14
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
ed0 at port 0x300-0x31f iomem 0xc8000-0xcbfff irq 11 drq 0 on isa0
ed0: address 00:00:c0:9b:e1:a8, type SMC8216/SMC8216C (16 bit)
fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0
ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode
ppc0: FIFO with 16/16/15 bytes threshold
plip0: <PLIP network interface> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <10 virtual consoles, flags=0x300>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
unknown: <PNP0401> can't assign resources
unknown: <PNP0501> can't assign resources
unknown: <PNP0501> can't assign resources
unknown: <PNP0700> can't assign resources
unknown: <PNP0303> can't assign resources
sbc0: <Creative SB AWE64> at port 0x220-0x22f,0x330-0x331,0x388-0x38b irq 5 drq 1,5 on isa0
pcm1: <SB16 DSP 4.16> on sbc0
ata0-master: DMA limited to UDMA33, non-ATA66 compliant cable
ad0: 19464MB <SAMSUNG SV2044D> [39546/16/63] at ata0-master WDMA2
acd0: CDROM <FX810T4> at ata0-slave using PIO3
Waiting 8 seconds for SCSI devices to settle
Mounting root from ufs:/dev/ad0s1a
cd0 at ahc0 bus 0 target 4 lun 0
cd0: <PLEXTOR CD-R PX-W1210S 1.00> Removable CD-ROM SCSI-2 device
cd0: 20.000MB/s transfers (20.000MHz, offset 15)
cd0: Attempt to query device size failed: NOT READY, Medium not present - tray closed
da0 at ahc0 bus 0 target 0 lun 0
da0: <IBM DORS-32160W WA6A> Fixed Direct Access SCSI-2 device
da0: 40.000MB/s transfers (20.000MHz, offset 8, 16bit), Tagged Queueing Enabled
da0: 2063MB (4226725 512 byte sectors: 255H 63S/T 263C)
I'm trying to dump an IDE drive (main drive) on an msdos filesystem
written on a SCSI disk (ahc driver). This is the command (in single
user mode!) that caused the dump:
# cd /msdos/dump/dump.8
# dump -0u -B 10000000 -f usr-fs.l0.dump /usr
/usr was not even mounted at this time.
I just upgraded from CURRENT 2001-01-25 to 2001-02-18:0100 CET.
Everything else _seems_ to work sofar (no libc problems etc...).
The panic is new (I've never had a panic in this situation with
the old kernel). The error above is reproducible.
Another problem is when shutting down: at least one buffer is never
flushed => enforcing fsck at next reboot. Something's wrong.
What's going on here?
Thanks,
-Farid.
--
Farid Hajji -- Unix Systems and Network Admin | Phone: +49-2131-67-555
Broicherdorfstr. 83, D-41564 Kaarst, Germany | farid.hajji@ob.kamp.net
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