I have seen similar lockup also with no provocation.
uname:
Linux orca 2.0.32 #1 Sat Nov 22 19:16:33 GMT 1997 i686
/proc/pci:
PCI devices found:
Bus 0, device 11, function 0:
VGA compatible controller: Silicon Integrated Systems Unknown device (rev
33).
Vendor id=1039. Device id=204.
Medium devsel.
Prefetchable 32 bit memory at 0xe0000000.
Non-prefetchable 32 bit memory at 0xe0400000.
I/O at 0x8200.
Bus 0, device 10, function 0:
Ethernet controller: 3Com 3C905 100bTX (rev 0).
Medium devsel. IRQ 10. Master Capable. Latency=248. Min Gnt=3.Max
Lat=8.
I/O at 0x8100.
Bus 0, device 8, function 0:
SCSI storage controller: Adaptec AIC-7881U (rev 0).
Medium devsel. Fast back-to-back capable. IRQ 11. Master Capable.
Latency=32. Min Gnt=8.Max Lat=8.
I/O at 0x8000.
Non-prefetchable 32 bit memory at 0xe0410000.
Bus 0, device 7, function 1:
IDE interface: Intel 82371SB Natoma/Triton II PIIX3 (rev 0).
Medium devsel. Fast back-to-back capable. Master Capable. Latency=32.
I/O at 0xf000.
Bus 0, device 7, function 0:
ISA bridge: Intel 82371SB Natoma/Triton II PIIX3 (rev 1).
Medium devsel. Fast back-to-back capable. Master Capable. No bursts.
Bus 0, device 0, function 0:
Host bridge: Intel 82441FX Natoma (rev 2).
Medium devsel. Fast back-to-back capable. Master Capable. Latency=32.
NRM
> Hello,
>
> For the 4th time now since installing 2.0.32 (about two weeks ago), our
> main server has experienced a total freeze. These freezes are very much
> like an SMP deadlock.
>
> The system is a clean 2.0.32 SMP kernel running on a dual PPro 200Mhz
> system w/ 192MB ram, 1 IDE boot drive with Triton DMA enabled (I've tried it
> disabled, no difference), 3 SCSI disks on one ncr53c810 and 7 CD-ROMs on a
> second ncr53c810, 2 8 port cyclades 8Yo serial port boards, a DEC tulip
> ethernet card @ 100Mbps and a S3virge/DX video board.
>
> There is no oops, there may or may not be a hard drive light on (one time
> out of three that I've been there to reset the machine the hard drive light
> was on), the screen is blanked and hitting the caps lock key doesn't light
> up the caps lock light, so it doesn't look like there is anybody home.
>
> The server runs shell/ppp/web accounts with appletalk, samba and IPX.
> Typical daemons for those services are, to my knowledge, all the latest
> available.
>
> Lockups occur about once every two days. Memory does not seem to be
> leaking -- no swap is being used. Heavy file activity between scsi and IDE
> doesn't seem to lock it up either.
>
> On the plus side, my filesystems are in tip-top shape. =)
>
> - Steve
>
> .------------------------------------------------. # * # # # # # #
> | Steve Baker | Barely Working | # ## # # # # #
> | ice@mama.indstate.edu | System Administrator | # # # # # # # #
> | Red-Hat Rulz! | Will work for hardware | # # # ## # # # #
> `-- SYS-ADMIN FOR HIRE, HAVE UNIX, WILL TRAVEL --' #### # # # ## # #
-- Niall Richard Murphy (NRM1-RIPE) Phone: +353-1-706-2499 UCD Computer Center, Belfield, Ireland Fax: +353-1-283-7077 Programmer Hostmaster, .IE Domain Registry--