Re: Random crashes

On Thu, 2003-08-28 at 15:25, Giuliano Pochini wrote:

On 28-Aug-2003 Benjamin Herrenschmidt wrote:

quoted

quoted

quoted

Strange. I haven't been reported such problems. Can you try an older kernel
just in case ? Could also be bad ram...

I tried 2.4.22 and I replaced the RAM. Nothing. Digging in the oops
collection I found this one which doesn't look very nice:

Jul 23 21:37:55 localhost kernel: Machine check in kernel mode.
Jul 23 21:37:55 localhost kernel: Caused by (from SRR1=20009030): L1 Data Cache error

I'll send the machine back for repair, altought I think they'll not even
notice the problem because it happens sporadically :(((

Well... I'm not 100% sure the message is correct, though from what you say,
it seems indeed there is a CPU fault...

Yes, but it happened only once. All the others were "normal" segfaults, in both
userspace and kernel space and hard lockups.

Did you try a few things like running single CPU and not enabling IRQ
distribution on all CPUs ?

.../...

Unrelated thing: tlbli instruction can cause problems on 7455 (bug.20).
arch/ppc/kernel/head.S does not use the suggested workaround.

We don't use tlbli on 745x, only on 603s.

Ben.


** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/