Re: [patch] Real-Time Preemption, -RT-2.6.9-rc4-mm1-U6

[K.R. Foley]

Ingo Molnar wrote:
> * Rui Nuno Capela <rncbc@xxxxxxxxx> wrote:
>
>
> > OK. After some incremental configurations, I've isolated that those
> > oops(es) only occurs if PREEMPT_TIMING and/or LATENCY_TRACE areset
> > (Y). My first suspect was that newest RWSEM_DEADLOCK_DETECT, but it
> > wasn't the case.
> >
> > So something has broken on that non-preemptible critical section
> > timing stuff since U4.
> >
> > Hasn't anybody else stumbled on this?
>
>
> i'm using it myself and havent seen the problem yet. Could you send me
> the latest .configs, the working and the broken one too? I'll try to
> reprodue it (or maybe someone else with a serial console sees it too).
>
> 	Ingo

I am seeing something similar here with both U5 and U6 on both of my SMP 
systems (actually I haven't gotten to try U6 on my SMP system at home 
yet.) On my SMP system here (dual Xeon) I get a handful of traces during 
the boot and then the last thing I see is a trace that has something to 
do with parport, but the key MIGHT be that it always seems to crap out 
when I get traces for 3-level deep critical section nesting. I will try 
to capture the trace the old-fashioned way when I get a chance shortly.

I do have U5 booted on my UP system at home though.

kr
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