Re: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm1-V0.7.28-0

[Ingo Molnar]

* K.R. Foley <kr@xxxxxxxxxx> wrote:

> I know I am late reporting this but I didn't figure it out until late
> this afternoon. I had trouble booting this one on my SMP workstation
> at the office. It would hang after it had almost finished booting.
> Anyway the solution was to disable tracing in /etc/rc.local and then
> re-enable it after it has finished booting. I know this happens late
> in the boot but it works for me.
> 
> echo 0 > /proc/sys/kernel/trace_enabled
> #echo 0 > /proc/sys/kernel/preempt_wakeup_timing
> #echo 50 > /proc/sys/kernel/preempt_max_latency
> 
> To be honest I am not sure which of the above fixes the late boot hang
> and I didn't have time to figure it out either. This doesn't happen on
> my SMP system here.

there's a generic bug i'm chasing right now that seems to get worse with
tracing enabled. The symptom of the bug is typically a system hang.

	Ingo
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