子进程的PID一定大于父进程的PID吗？
如题
[解决办法]
没关系。
[解决办法]
Process Identifiers
By default Linux wraps around the process identifiers when they exceed 32768. Increasing the interval between these rollovers is beneficial to ease process identifcation and process management within Condor (i.e., prevent fork() failures).
