2.9-stable system freeze

[<alex@unixdot.com>]

Hi,

When I was working remotely on my system (a mysql
commandline session), it suddenly froze, more or
less.

I was working in a screen session. I still could
browse through the various screens, but all things
needing disk access seemed to (have) stop(ped)/
would not run.

Pinging the host still worked. The box is a NAT
gateway, that too worked.
At the console, Alt-F* still worked, but logging
in didn't.
No strange messages printed on the console either.

After a power cycle, things worked as usual. No
data loss or corrupt partitions, only two problems
with incorrect block count were salvaged (thanks
softupdates:)

I checked the logs (messages, authlog, daemon),
but nothing there to indicate any problem at all.

So I browsed through the mailinglist archives
and saw some other people with vague freeze ups,
etc rather similar to this case. But no solution
was ever presented. That's why I decided to mail
the problem to the list, perhaps someone can
extract some valuable info from it and other cases
and combine it to work out a solution.. maybe..
(nooit geschoten is altijd mis)

I ran OpenBSD 2.7 for almost a year flawlessly on
the very same hardware.

	---Alex.


dmesg:
OpenBSD 2.9-stable (build) #2: Sun Jul 22 02:20:32 CEST 2001
    alex@atlantis:/home/alex/data/ATLANTIS/build
cpu0: F00F bug workaround installed
cpu0: Intel Pentium/MMX ("GenuineIntel" 586-class) 233 MHz
cpu0: FPU,V86,DE,PSE,TSC,MSR,MCE,CX8,MMX
real mem  = 133804032 (130668K)
avail mem = 122421248 (119552K)
using 1658 buffers containing 6791168 bytes (6632K) of memory
mainbus0 (root)
bios0 at mainbus0: AT/286+(00) BIOS, date 07/15/95, BIOS32 rev. 0 @ 0xfdb80
pcibios0 at bios0: rev. 2.1 @ 0xf0000/0x10000
pcibios0: PCI BIOS has 5 Interrupt Routing table entries
pcibios0: PCI bus #0 is the last bus
bios0: ROM list: 0xc0000/0x8000
pci0 at mainbus0 bus 0: configuration mode 1 (bios)
pchb0 at pci0 dev 0 function 0 "Intel 82439TX System" rev 0x01
pcib0 at pci0 dev 7 function 0 "Intel 82371AB PIIX4 ISA" rev 0x01
pciide0 at pci0 dev 7 function 1 "Intel 82371AB IDE" rev 0x01: DMA, channel 0 wired to compatibility, channel 1 wired to compatibility
wd0 at pciide0 channel 0 drive 0: <QUANTUM FIREBALL EX10.2A>
wd0: 16-sector PIO, LBA, 9787MB, 16383 cyl, 16 head, 63 sec, 20044080 sectors
pciide0: channel 0 interrupting at irq 14
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2
atapiscsi0 at pciide0 channel 1
scsibus0 at atapiscsi0: 2 targets
pciide0:1:1: IDENTIFY timed out
cd0 at scsibus0 targ 1 lun 0: <AZT, 106801I SE, 1.00> SCSI0 5/cdrom removable
wd1 at pciide0 channel 1 drive 0: <M1614TA>
wd1: 16-sector PIO, LBA, 1040MB, 2114 cyl, 16 head, 63 sec, 2131584 sectors
pciide0: channel 1 interrupting at irq 15
wd1(pciide0:1:0): using PIO mode 4, DMA mode 2
cd0(pciide0:1:1): using PIO mode 3
"Intel 82371AB USB" rev 0x01 at pci0 dev 7 function 2 not configured
"Intel 82371AB Power Management" rev 0x01 at pci0 dev 7 function 3 not configured
rl0 at pci0 dev 8 function 0 "Realtek 8139" rev 0x10: irq 9 address 00:50:fc:09:55:76
rlphy0 at rl0 phy 0: RTL internal phy
xl0 at pci0 dev 9 function 0 "3Com 3c905 100Base-TX" rev 0x00: irq 10 address 00:60:08:49:c4:54
nsphy0 at xl0 phy 24: DP83840 10/100 media interface, rev. 1
vga1 at pci0 dev 11 function 0 "Matrox MGA 1064SG 220MHz" rev 0x03
wsdisplay0 at vga1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
isa0 at pcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pcppi0 at isa0 port 0x61
sysbeep0 at pcppi0
npx0 at isa0 port 0xf0/16: using exception 16
fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
isapnp0 at isa0 port 0x279: read port 0x203
"DTC436E, DTC436E, , " at isapnp0 port 0x240/32 irq 3 not configured
biomask c040 netmask c640 ttymask c642
pctr: 586-class performance counters and user-level cycle counter enabled
dkcsum: wd0 matched BIOS disk 80
dkcsum: wd1 matched BIOS disk 81
root on wd0a
rootdev=0x0 rrootdev=0x300 rawdev=0x302
WARNING: / was not properly unmounted