Why should Linux architecture be divided into user space and kernel space?

Alibaba cloud Q & A 2022-02-13 06:22:04 阅读数:310

linux architecture divided user space

as a result of ？

Take the answer 1：

1、 modern CPU Different working modes are realized , In different modes CPU The instructions that can be executed are different from the registers that are accessed .

2、Linux from CPU From the angle of , To protect the security of the kernel , Divide the system into two parts .

copyright：author[Alibaba cloud Q & A]，Please bring the original link to reprint, thank you. https://en.javamana.com/2022/02/202202130622029098.html

《 How to transfer user space to kernel space in Linux?

How to transfer user space to kernel space in Linux? 》

What does it mean that the working state of the server under zookeeper is leading?
Zookeeper's data synchronization is usually divided into several categories?
What are the characteristics of JavaScript scripting language?
When will zookeeper clusters fail?
What is the difference between zookeeper load balancing and nginx load balancing?
What are the deployment modes of zookeeper?
There are three servers in the cluster, one of which is down. Can zookeeper still be used at this time?
Is zookeeper's watch listening notification to the node permanent?
Why is zookeeper's watch listening notification to nodes not permanent?
What are the Java clients of zookeeper?
What is chubby and what is the difference between chubby and zookeeper?
What commands are commonly used by zookeeper?
Security - recurrence of Apache httpd newline parsing vulnerability (cve-2017-15715)
Linux key directory
PHP design pattern (factory pattern)
HTTP request parsing
How to refresh JTable in Java
Come on
Java obtains the Tomcat port number and project name without using request
How to find the value of arithmetic expression by operator priority method in data structure textbook?
How to grab the ID of input method candidate window under Linux?
How to uninstall oracle11client cleanly! No universal installer
Query the names of employees with the second and third highest salary in each department in Oracle
Using data structure (c + +) to realize the search function in the management system
What are the typical application scenarios of zookeeper?
What can zookeeper do for data publishing / subscription?
What are the characteristics of data (configuration information) when zookeeper is used for data publishing / subscription?
How to realize data publish / Subscribe Based on zookeeper?
What is zookeeper's naming service?
How does zookeeper implement distributed notification and coordination?
How to implement zookeeper's configuration management (file system, notification mechanism)?
How to implement zookeeper cluster management (file system and notification mechanism)?
How to implement zookeeper distributed lock (file system, notification mechanism)?
How to implement zookeeper's queue management (file system, notification mechanism)?
What is zookeeper's cluster management?
What is the main node election function of zookeeper?
What are the distributed locks provided by zookeeper?
What is zookeeper's notification mechanism?
What is Tomcat?
What is the default port of Tomcat and how to modify it?
What are the connector operation modes (optimized) of Tomcat?
How many deployment modes does Tomcat have?
How to use Tomcat's automatic deployment to deploy web applications in Tomcat?
How to deploy a web application in Tomcat using the manager app console?
How to use and modify conf / server to deploy web applications in Tomcat XML file deployment?
How to add custom web deployment files when deploying web applications in Tomcat?
How does the Tomcat container create servlet class instances?
As a servlet container, how many working modes does Tomcat have?
The requests to enter Tomcat can be divided into several categories according to the working mode of Tomcat?
Which God has or can draw the top-level structure diagram of Tomcat?
What is the main function of Tomcat connector?
What is the main function of Tomcat container?
Docker - V cannot start the container as soon as it is mapped. How to check it? How to solve it?
How does Tomcat's connector accept requests?
If gitlab deployed with docker can only use HTTP, but not git address, how to deal with it?
Docke deploy tomcat, / lib64 / LD linux-x86-64 so. 2. How to solve the problem if it cannot be found?
After docker builds nginx PHP, how to deal with the blank display in accessing PHP files?
How does Tomcat's container handle requests?
Why can't the soft connection in Linux be accessed in docker? How to solve it!
What's the difference between UNIX and Linux?