Ingo Molnar wrote:
> * Mark_H_Johnson@raytheon.com <Mark_H_Johnson@raytheon.com> wrote:
> 
> 
>> - echo 0 > /proc/sys/kernel/preempt_wakeup_timing [entered, but
>>display was frozen at this point and did not see newline nor any
>>further output]
> 
> 
> managed to reproduce this on an SMP box but not on an UP box, so i think
> this is SMP related. It definitely happens almost immediately after
> preempt_wakeup_timing is reset - or after preempt_max_timing is reset. 
> (Perhaps a dump_stack() from the wrong place, or something like that.)
> 
> 	Ingo
> 

I can't reproduce this on my SMP workstation here at the office now. As 
you may recall I did have something similar going on in the recent past 
when booting this system. I am attaching my config in hopes that maybe 
that will help.

kr