> 
> KSTACK_CHECK_MAGIC scans kernel stack on each context switch.
> so it affects performance too much.
> 
> KSTACK_CHECK_DR0 uses a debug register exclusively, so
> people that want to use it for other purposes will not want to
> enable it.
> 
Please don't force it to be on all arch's, vax already have guard pages 
(red zones) for the kernel stacks.

-- Ragge