RE: Linux 2.2.2pre4 SMP crash (wait_on_bh)

Terry Katz (katz@advanced.org)
Sat, 20 Feb 1999 10:27:57 -0500


I've experienced the same problem... 2.2.1, and 2.2.2pre2... There have been
a number of people who have brought this up... No one has really been
helpful in an answer as to how to fix. Linus suggested 2.2.2pre2 to me a
short time ago, but just recently it happened with that so ...

For us it seems to occur once every few days .. with 2.2.1 it occurred maybe
once every 3 .. with 2.2.2pre2 its like evey 5-6 ..

I wish I knew the reason why it occurs, but I don't....

-Terry
katz@advanced.org

> This also seemed to happen with stock 2.2.1. 5:30 AM, when the machine was
> lightly loaded it went down... I saw a number of these repeated on my
> screen :
>
> wait_on_bh, CPU0
> irq: 0 [0 0]
> bh: 1 [0 1]
> <[c0109141]> <[c016cacd]> <[c01671df]> <[c0167464]> <[c01748ce]>
> <[c0155ecf]> <[c01562a5]> <[c01266af]>
>
> I tried looking to see if these symbols matched anything in my running
> kernel and couldn't even match one of them. I have no modules running so
> it can't be that I simply missed a symbol :)
>
> Since I couldn't scroll up, I have no way to tell if there was an oops
> above these repeated messages.
>
> alt-sysreq-* printed out, but didn't appear to do anything. (ie,
> alt-sysreq-u never said "ok" or "done".. but did say, "remounting r/o")
>
> Box:
>
> Dual P2 266
> 256 megs of RAM
> Mylex Buslogic SCSI adapter
> Intel EEpro 100
> Egcs 1.1 release
>
> This box does act as an NFS server, using userland NFS.
>
>
> Jordan
>
> --
> Jordan Mendelson : http://jordy.wserv.com
> Web Services, Inc. : http://www.wserv.com
>
>
>
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