New SCHED_SMP diff.

[Thomas Sparrevohn]

On Monday 02 July 2007 20:02:41 Jeff Roberson wrote:
> On Mon, 2 Jul 2007, Thomas Sparrevohn wrote:
> 
> >
> 
> Hi, can you try sysctl kern.sched.steal_busy=1?  Please tell me if that 
> improves things.  This will resolve short-term load imbalances by stealing 
> threads from other processors.
> 
> Thanks,
> Jeff
> 

If I enable "kern.sched.steal_busy" the system panics within a couple
of seconds with a "spin lock held to long". 

Mind you that the kernels I have use has all debugging turned off e.g. 
no WITHNESS etc. so it could be that - I quite a while if I am to rerun
all tests with WITHNESS etc enabled - Do you want me to or do you have 
a suggestion as to why it panics?