When a process running in user mode requests additional memory, pages are allocated from the list of free page frames maintained by the kernel. This list is typically populated using a page-replacement algorithm such as those discussed in Section 9.4
1什么是进程:进程是一个执行中的程序 执行的程序: 代码->资源->CPU 进程有很多数据维护:进程状态/进程属性 所有进程属性采用的一个树形结构体维护 ps -a//所有进程 ps -aue //有效进程 进程状态:(man ps) D Uninterruptible sleep (usually IO) R Running or runnable (on run queue) S Interruptible sleep (wai
查看最大线程数: cat /proc/sys/kernel/threads-max ulimit User limits - limit the use of system-wide resources. Syntaxulimit [-acdfHlmnpsStuv] [limit] Options -S Change and report the soft limit associated with a resource. -H Change and report the hard limit