I get easily reproducable panics (supervisor read, page not present)
in today's -CURRENT; yesterday's sources with the same config works
fine. The kernel panics almost immediately if I run something that
does a lot of writing to disk, such as a kernel or port build. It
refuses to dump (dump already in progress) and I don't have a serial
console handy for DDB, so no dump or backtrace, though according to
nm(1) the page fault occurs in xpt_release_devq() in aic7xxx.c. I've
attached the kernel config and the output of dmesg (from the kernel
that works, not the one that panics).

# Kernel configuration for md5.follo.net
machine         i386
cpu             I586_CPU
ident           MD5
maxusers        64

# Debugging
options         DDB
options         KTRACE

# Networking
options         INET

# File system
options         FFS, FFS_ROOT, SOFTUPDATES
options         PROCFS

# XFree86 support
options         UCONSOLE

# Misc. kernel options
options         AUTO_EOI_1, AUTO_EOI_2
options         COMPAT_43
options         INCLUDE_CONFIG_FILE
options         RANDOMDEV

# POSIX real-time extensions
options         P1003_1B
options         _KPOSIX_VERSION=199309L

config          kernel

# Buses
device          isa
device          pci
device          apm

# Numeric processor extensions
device          npx

# Floppy controller
device          fdc

# ATAPI controllers
device          ata
device          atadisk

# SCSI controllers
device          ahc
device          scbus
options         SCSI_DELAY=2000
device          pass
device          da
device          sa
options         SA_SPACE_TIMEOUT="(4*60)"
device          cd

# System console and mouse
device          atkbdc
device          atkbd
#device         psm
device          vga
device          sc              1
options         SC_DFLT_FONT
makeoptions     SC_DFLT_FONT=iso
options         SC_PIXEL_MODE
options         SC_HISTORY_SIZE=1024
device          splash
options         VESA

# I/O ports
device          sio
device          sio
device          ppc

# PPBus devices
device          ppbus
device          lpt
device          plip
device          ppi

# Network adapters
#device         miibus
#device         fxp

# TeleS S0/16.3 passive ISDN adapter
options         TEL_S0_16_3
device          isic

# ISDN protocol stack
device          "i4bq921"
device          "i4bq931"
device          "i4b"

# ISDN devices
device          "i4btrc"        4
device          "i4bctl"
device          "i4brbch"       4
device          "i4btel"        2

# Networking pseudo-devices
device          loop            2
device          ether
device          tun
device          bpf

# Other pseudo-devices
device          pty
device          vn

# Audio codec
device          pcm
device          sbc

Copyright (c) 1992-2000 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 #30: Sun Jul  9 22:44:49 CEST 2000
    [EMAIL PROTECTED]:/usr/src/sys/compile/MD5
Timecounter "i8254"  frequency 1193182 Hz
CPU: Pentium/P54C (166.19-MHz 586-class CPU)
  Origin = "GenuineIntel"  Id = 0x52c  Stepping = 12
real memory  = 134217728 (131072K bytes)
avail memory = 127635456 (124644K bytes)
Preloaded elf kernel "kernel.works" at 0xc02cc000.
Intel Pentium detected, installing workaround for F00F bug
VESA: v2.0, 2304k memory, flags:0x0, mode table:0xc0274d42 (1000022)
VESA: Tseng Labs ET6000
npx0: <math processor> on motherboard
npx0: INT 16 interface
apm0: <APM BIOS> on motherboard
apm: found APM BIOS v1.2, connected at v1.2
pcib0: <Host to PCI bridge> on motherboard
pci0: <PCI bus> on pcib0
pci0: <Intel 82439HX PCI cache memory controller> at 0.0
isab0: <Intel 82371SB PCI to 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: <Tseng Labs ET6000/ET6100 graphics accelerator> at 9.0 irq 9
pci0: <unknown card> (vendor=0x8086, dev=0x1229) at 10.0 irq 9
pci0: <unknown card> (vendor=0x1274, dev=0x1371) at 11.0 irq 12
ahc0: <Adaptec 2940 Ultra SCSI adapter> port 0xd000-0xd0ff mem 0xf8000000-0xf8000fff 
irq 11 at device 12.0 on pci0
ahc0: aic7880 Wide Channel A, SCSI Id=7, 16/255 SCBs
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
sc0: <System console> on isa0
sc0: VGA <16 virtual consoles, flags=0x200>
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
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
isic0 at port 0xd80-0xd9f,0x980-0x99f,0x180-0x19f,0x580-0x59f irq 5 flags 0x3 on isa0
isic0: Teles S0/16.3
ppc0: <Parallel port> at port 0x378-0x37b irq 7 on isa0
ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode
ppc0: FIFO with 16/16/15 bytes threshold
ppi0: <Parallel I/O> on ppbus0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
plip0: <PLIP network interface> on ppbus0
isa0: <@@@0000> found
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
isa0: <@@@0000> found
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
isa0: <PNP0800> found
IP packet filtering initialized, divert disabled, rule-based forwarding disabled, 
default to deny, unlimited logging
i4b: ISDN call control device attached
i4bctl: ISDN system control port attached
i4btel: 2 ISDN telephony interface device(s) attached
i4brbch: 4 raw B channel access device(s) attached
i4btrc: 4 ISDN trace device(s) attached
ad0: 6149MB <QUANTUM FIREBALL ST6.4A> [13328/15/63] at ata0-master using WDMA2
Waiting 2 seconds for SCSI devices to settle
sa0 at ahc0 bus 0 target 3 lun 0
sa0: <TECMAR TRAVAN NS8 P611> Removable Sequential Access SCSI-2 device 
sa0: 10.000MB/s transfers (10.000MHz, offset 8)
Mounting root from ufs:/dev/da0a
da0 at ahc0 bus 0 target 2 lun 0
da0: <QUANTUM XP34550W LXY1> Fixed Direct Access SCSI-2 device 
da0: 40.000MB/s transfers (20.000MHz, offset 8, 16bit), Tagged Queueing Enabled
da0: 4341MB (8890760 512 byte sectors: 255H 63S/T 553C)
cd0 at ahc0 bus 0 target 5 lun 0
cd0: <TOSHIBA CD-ROM XM-3801TA 1047> Removable CD-ROM SCSI-2 device 
cd0: 10.000MB/s transfers (10.000MHz, offset 8)
cd0: Attempt to query device size failed: NOT READY, Medium not present
da1 at ahc0 bus 0 target 4 lun 0
da1: <CONNER CFP1080S 4649> Fixed Direct Access SCSI-2 device 
da1: 10.000MB/s transfers (10.000MHz, offset 15), Tagged Queueing Enabled
da1: 1030MB (2110812 512 byte sectors: 255H 63S/T 131C)
WARNING: / was not properly dismounted

Dag-Erling Smorgrav - [EMAIL PROTECTED]

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