<
< * Add code to detect an SMP machine and handle spinlocks accordingly
<   from distributted.net, http://www1.distributed.net/source,
<   in client/common/cpucheck.cpp
<
<   On SMP machines, it is possible that locks might be released shortly,
<   while on non-SMP machines, the backend should sleep so the process
<   holding the lock can complete and release it.