SMP_SPINWAIT

   SMP_SPINWAIT establishes, in 10-microsecond intervals, the amount
   of time a CPU in an SMP system normally waits for access to a
   shared resource. This process is called spinwaiting.

   A timeout causes a CPUSPINWAIT bugcheck.

   The default value is 100000 (100,000 10-microsecond intervals or
   1 second).