Date: Tue, 16 Nov 1999 02:57:50 -0500 From: Omar Thameen <omar@clifford.inch.com> To: hackers@FreeBSD.ORG Subject: panic: page fault - need help with diagnosis Message-ID: <19991116025749.A31559@clifford.inch.com>
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Hi,
We have a server running 3.2-RELEASE #2 (see dmesg below) which crashed
during a period of light activity. It's a dedicated server hosting one
large web site (Apache 1.3.4 with php) and a half dozen smaller sites.
There's a mysql server as well, though the main db work is done by a
separate machine.
The server became remotely unresponsive (couldn't ping, couldn't
console in) and had nothing in the logs. It was locked with the
following on the screen, which I transcribed. I had to hit the
reset switch to bring it back.
Can anyone offer any insight as to what happened and if there
are any problems?
Thanks much,
Omar
------------------------- Begin included text -------------------------
panic: free: multiple pfrees
syncing disks...
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0xb8
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc01492eb
stack pointer = 0x10:0xc01ef2cc
frame pointer = 0x10:0xc01ef2e0
code segment = base 0x0, limit 0xfffff, type 0x1b
= TPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = idle
interrupt mask = net tty bio cam
trap number = 12
panic: page fault
-------------------------- End included text --------------------------
dmesg output:
------------------------- Begin included text -------------------------
Copyright (c) 1992-1999 FreeBSD Inc.
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
FreeBSD 3.2-RELEASE #2: Mon Aug 2 12:23:54 EDT 1999
spork@:/usr/src/sys/compile/LOCAL_KERN
Timecounter "i8254" frequency 1193182 Hz
Timecounter "TSC" frequency 350797746 Hz
CPU: Pentium II/Xeon/Celeron (350.80-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0x652 Stepping=2
Features=0x183f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,<b24>>
real memory = 536870912 (524288K bytes)
avail memory = 519847936 (507664K bytes)
Preloaded elf kernel "kernel" at 0xc0255000.
Preloaded userconfig_script "/boot/kernel.conf" at 0xc025509c.
Probing for devices on PCI bus 0:
chip0: <Intel 82443BX host to PCI bridge> rev 0x02 on pci0.0.0
chip1: <Intel 82443BX host to AGP bridge> rev 0x02 on pci0.1.0
chip2: <Intel 82371AB PCI to ISA bridge> rev 0x02 on pci0.4.0
chip3: <Intel 82371AB Power management controller> rev 0x02 on pci0.4.3
ahc0: <Adaptec aic7890/91 Ultra2 SCSI adapter> rev 0x00 int a irq 10 on pci0.6.0
ahc0: aic7890/91 Wide Channel A, SCSI Id=7, 16/255 SCBs
fxp0: <Intel EtherExpress Pro 10/100B Ethernet> rev 0x05 int a irq 11 on pci0.7.0
fxp0: Ethernet address 00:e0:18:90:ad:51
vga0: <Trident model 9660 VGA-compatible display device> rev 0xd3 int a irq 10 on pci0.9.0
Probing for devices on PCI bus 1:
Probing for PnP devices:
Probing for devices on the ISA bus:
sc0 on isa
sc0: VGA color <16 virtual consoles, flags=0x0>
atkbdc0 at 0x60-0x6f on motherboard
atkbd0 irq 1 on isa
sio0 at 0x3f8-0x3ff irq 4 flags 0x10 on isa
sio0: type 16550A
sio1 at 0x2f8-0x2ff irq 3 on isa
sio1: type 16550A
fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
fdc0: FIFO enabled, 8 bytes threshold
fd0: 1.44MB 3.5in
ppc0 at 0x378 irq 7 flags 0x40 on isa
ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode
ppc0: FIFO with 16/16/9 bytes threshold
lpt0: <generic printer> on ppbus 0
lpt0: Interrupt-driven port
ppi0: <generic parallel i/o> on ppbus 0
plip0: <PLIP network interface> on ppbus 0
lpt0: <generic printer> on ppbus 0
lpt0: Interrupt-driven port
vga0 at 0x3b0-0x3df maddr 0xa0000 msize 131072 on isa
npx0 on motherboard
npx0: INT 16 interface
Waiting 2 seconds for SCSI devices to settle
changing root device to da0s1a
da0 at ahc0 bus 0 target 0 lun 0
da0: <MYLEX DAC960SX 4357B1 4332> Fixed Direct Access SCSI-2 device
da0: 40.000MB/s transfers (20.000MHz, offset 16, 16bit), Tagged Queueing Enabled
da0: 4357MB (8923136 512 byte sectors: 255H 63S/T 555C)
da1 at ahc0 bus 0 target 0 lun 1
da1: <MYLEX DAC960SX 8715B1 4332> Fixed Direct Access SCSI-2 device
da1: 40.000MB/s transfers (20.000MHz, offset 16, 16bit), Tagged Queueing Enabled
da1: 8715MB (17848320 512 byte sectors: 255H 63S/T 1111C)
WARNING: / was not properly dismounted
-------------------------- End included text --------------------------
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