Shulou(Shulou.com)06/02 Report--

Preparatory knowledge of communication between processes:

1. User mode and kernel state, when a process is in the user running state when executing the user's own code, and in the kernel running state when a process is trapped in the kernel code because of the system call.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.