Re: Realtime Preemption, 2.6.12, Beginners Guide?

[Alistair John Strachan]

On Thursday 07 Jul 2005 12:29, Ingo Molnar wrote:
> * Alistair John Strachan <s0348365@xxxxxxxxxxxx> wrote:
> > Unfortunately, since this is called when the kernel crashes, it's
> > impossible for me to capture any messages prior to this spam, if there
> > even are any.
>
> this is where serial logging (or netconsole/netlogging) may be useful.
>
> do you have DEBUG_STACKOVERFLOW and latency tracing still enabled?  The
> combination of those two options is pretty good at detecting stack
> overflows. Also, you might want to enable CONFIG_4KSTACKS, that too
> disturbs the stack layout enough so that the error message may make it
> to the console.

I already have 4KSTACKS on. Latency tracing is enabled, but STACKOVERFLOW 
isn't; I'll just reenable everything again until we fix this. Do you think if 
I removed the printk() line I might get some useful information, before it 
does the stack trace?

I'm happy enough to work with this indefinitely now, at least I have a certain 
cause for the lockups, so I can continue to use the machine for R&D.

-- 
Cheers,
Alistair.

personal:   alistair()devzero!co!uk
university: s0348365()sms!ed!ac!uk
student:    CS/CSim Undergraduate
contact:    1F2 55 South Clerk Street,
            Edinburgh. EH8 9PP.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/