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如果进程数大于 pid_max 会发生什么情况？

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如果进程数大于 pid_max 会发生什么情况？

假设我不编辑文件：/proc/sys/kernel/pid_max。因此，我假设最大 PID 为 32768。

如果我创建 32769 个同时进程会发生什么情况？

答案1

从man forkOS X（以及一般基于 BSD 的系统）开始：

ERRORS
 Fork() will fail and no child process will be created if:

 [EAGAIN]    The system-imposed limit on the total number of processes under
             execution would be exceeded.
             This limit is configuration-dependent.

 [EAGAIN]    The system-imposed limit MAXUPRC (<sys/param.h>) on the total number
             of processes under execution by a single user would be exceeded.

 [ENOMEM]    There is insufficient swap space for the new process.

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