Programmer Group

The completion quantity is designed based on the waiting queue, so it is obviously impossible to use the completion quantity in the interrupt context. struct completion { unsigned int done; wait_queue_head_t wait; }; Let's take a classic example of using completion quantity: struct kthread_create_info { /* Information passed to k ...

preface "Ftrace is a tracking tool built into the Linux kernel. Many Linux distributions have enabled various configurations of ftrace in the latest versions. One of the benefits of ftrace to Linux is that it can view what happens inside the kernel, better find the exact cause of the crash, and help developers create the right solution ...

Linux device driver learning notes - character device driver - Note.1 LINUX DEVICE DRIVERS，3RD EDITION 1, Character drive [1] Primary and secondary equipment No Character devices are accessed by names in the file system. Device files with names called file systems Specify that they are located in the / dev directory. You can view thei ...

1, Resistance screen 1. Principle of resistance screen The resistance screen is based on Ohm's law. It has two layers of thin films. The thin film is the resistance. When the upper and lower layers are in contact, the upper and lower films are in contact. At this time, the contact voltage can be measured. X coordinate: when 3.3v voltage is ...

Netfilter framework of Linux kernel Initial publication Nuggets The author has done some research on Linux kernel related modules to realize kernel level communication encryption and video stream encryption, including Linux kernel network protocol stack, Linux kernel communication module, Linux kernel encryption module, secret key gen ...