Re: 2.4.21 reiserfs oops

Nix
2003-06-23T22:19:40Z

On Mon, 23 Jun 2003, Oleg Drokin said:
> Hello!
>
> On Sun, Jun 22, 2003 at 03:00:20PM +0100, Nix wrote:
>
>> Jun 22 13:52:42 loki kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000001
>
> This is very strange address to oops on.

I'll say! Looks almost like it JMPed to a null pointer or something.

>> Jun 22 13:52:43 loki kernel: EIP: 0010:[<c0092df4>] Not tainted
>
> And the EIP is prior to kernel start which is also very strange.
> On the other hand the address c0192df4 is somewhere inside reiserfs code,
> so it looks like a single bit error, I'd say.

I think it unlikely to be RAM problems given that the problem happened
shortly after upgrading to 2.4.21; this was about half a day after I
rebooted it because it threw a pile of never-seen-again, un-syslogged
SCSI abort errors at me (sym53c875); and *that* was a few minutes after
I rebooted into 2.4.21 for the first time.

All my other boxes love 2.4.21, but this one dislikes it. (Of course it
has to be my second-most-critical server... ah well, the NFS problems
in 2.4.20 bit my most critical server and my home directory both, so
I guess this is less unpleasant.)

> Can you run memtest86 for some time to verify that your RAM is OK?

Did that last night; no problems reported. (Not really surprising.)

> (hm, and the oops got twice to the logs which is pretty strange thing, too,
> never seen anything like this).

That's my weirdly broken syslog config. I've never got around to fixing
it; it only happens with kernel messages and I don't get all that many
of those.