Date: Fri, 9 Oct 1998 11:41:24 -0700 (PDT) From: ben@rosengart.com To: freebsd-gnats-submit@FreeBSD.ORG Subject: kern/8235: kernel refuses to dump core Message-ID: <199810091841.LAA23002@hub.freebsd.org>
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>Number: 8235
>Category: kern
>Synopsis: kernel refuses to dump core
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Fri Oct 9 11:50:01 PDT 1998
>Last-Modified:
>Originator: Ben Rosengart
>Organization:
Icon CMT Corp.
>Release: 3.0-beta
>Environment:
FreeBSD narcissus.net 3.0-BETA FreeBSD 3.0-BETA #0: Tue Oct 6 00:07:56 EDT 1998 root@narcissus.net:/usr/src/sys/compile/DSUEVEN i386
>Description:
At DES' suggestion, I compiled up a DDB kernel, booted the system with
it, dropped to the debugger, and called panic. The result:
syncing disks... Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x30
fault code = supervisor read, page not present
instruction pointer = 0x8:0xf017af00
stack pointer = 0x10:0xf01d1cdc
frame pointer = 0x10:0xf01d1ce0
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 = Idle
interrupt mask = tty bio
kernel: type 12 trap, code=0
Stopped at _Debugger+0x35: movb $0,_in_Debugger.98
When I called panic again, the system printed a "dumping" message, but
simply hung, and eventually printed an I/O error message and offered to
reboot.
Since the output of nm /kernel | sort is about 175K, rather than spam
the list with it, I put it at http://www.interport.net/~float/nm.out.
Here is my dmesg.boot:
Copyright (c) 1992-1998 FreeBSD Inc.
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
FreeBSD 3.0-BETA #0: Tue Oct 6 00:07:56 EDT 1998
root@narcissus.net:/usr/src/sys/compile/DSUEVEN
Timecounter "i8254" frequency 1193182 Hz cost 3499 ns
Timecounter "TSC" frequency 199433076 Hz cost 252 ns
CPU: Pentium Pro (199.43-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0x617 Stepping=7
Features=0xf9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV>
real memory = 100663296 (98304K bytes)
avail memory = 95535104 (93296K bytes)
Probing for devices on PCI bus 0:
chip0: <Intel 82440FX (Natoma) PCI and memory controller> rev 0x02 on pci0.0.0
chip1: <Intel 82371SB PCI to ISA bridge> rev 0x01 on pci0.7.0
vga0: <S3 ViRGE graphics accelerator> rev 0x06 int a irq 11 on pci0.11.0
bt0: <Buslogic Multimaster SCSI host adapter> rev 0x08 int a irq 9 on pci0.15.0
bt0: BT-948 FW Rev. 5.05R Ultra Narrow SCSI Host Adapter, SCSI ID 7, 192 CCBs
Probing for devices on the ISA bus:
sc0 at 0x60-0x6f irq 1 on motherboard
sc0: VGA color <16 virtual consoles, flags=0x0>
ed0 at 0x300-0x31f irq 10 on isa
ed0: address 00:40:05:1e:df:32, type NE2000 (16 bit)
sio0 at 0x3f8-0x3ff irq 4 flags 0x10 on isa
sio0: type 16550A
sio1 at 0x2f8-0x2ff irq 3 on isa
sio1: type 16550A
lpt0 at 0x378-0x37f irq 7 on isa
lpt0: Interrupt-driven port
lp0: TCP/IP capable interface
pcm0 at 0x220 irq 5 drq 1 on isa
WARNING: sb: misconfigured secondary DMA channel
fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
fdc0: FIFO enabled, 8 bytes threshold
fd0: 1.44MB 3.5in
bt: unit number (1) too high
bt1 not found
npx0 on motherboard
npx0: INT 16 interface
changing root device to da0s1a
da0 at bt0 bus 0 target 0 lun 0
da0: <CONNER CFP2107S 2.14GB 5767> Fixed Direct Access SCSI2 device
da0: 3.300MB/s transfers, Tagged Queueing Enabled
da0: 2048MB (4194304 512 byte sectors: 255H 63S/T 261C)
da1 at bt0 bus 0 target 6 lun 0
da1: <QUANTUM FIREBALL_TM3200S 300X> Fixed Direct Access SCSI2 device
da1: 3.300MB/s transfers, Tagged Queueing Enabled
da1: 3067MB (6281856 512 byte sectors: 255H 63S/T 391C)
WARNING: / was not properly dismounted
cd0 at bt0 bus 0 target 2 lun 0
cd0: <PLEXTOR CD-ROM PX-8XCS 1.02> Removable CD-ROM SCSI2 device
cd0: 3.300MB/s transfers
cd0: cd present [193127 x 2048 byte records]
ffs_mountfs: superblock updated
ffs_mountfs: superblock updated
>How-To-Repeat:
Boot with DDB, drop to debugger, call panic. As far as I can tell, no
one else is experiencing this problem.
>Fix:
>Audit-Trail:
>Unformatted:
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