What is the difference between setup_irq and request_irq in Linux kernel interrupts ?
Timers are setup very early, before the request_irq() infrastructure has been initialised. Hence, setup_irq is used to … Read more
Core Kernel
Core Kernel
How to resolve error : dtc: command not found
When trying to compile uboot on Ubuntu, we seen the following error, From the error it looks … Read more
How to invoke OOM Killer manually for understanding which process gets killed first ?
As we have seen in our previous post “Understanding Linux OOM Killer and avoiding perticular process from … Read more
Send and receive data from user space and kernel using Netlink sockets
As mentioned in Linux kernel souce code net/netlink/af_netlink.c, netlink is a Kernel-user communication protocol which allows user … Read more
Communication between user-space and kernel space using Netlink sockets
As mentioned in Linux kernel souce code net/netlink/af_netlink.c, netlink is a Kernel-user communication protocol which allows user … Read more
Building kernel module as part of kernel compilation procedure
If you have already followed “Writing first Linux kernel Module and understanding Kernel module compilation, loading and … Read more
Implementation of Interrupt Handler (IRQ) in Linux kernel driver
Following driver implements, how we can allocate an interrupt line using request_irq kernel API and how to … Read more
How Linux Kernel Module Loading works ?
The kernel bus drivers probe for devices. For every detected device, the kernel creates an internal device … Read more