K 10 svn:author V 7 davidxu K 8 svn:date V 27 2008-10-23T07:55:38.451671Z K 7 svn:log V 225 Actually, for signal and thread suspension, extra process spin lock is unnecessary, the normal process lock and thread lock are enough. The spin lock is still needed for process and thread exiting to mimic single sched_lock. END