2020-10-31

perf setup

This post describes the necessary setup for Linux-perf. The setup machine is an Ubuntu VM. No custom kernel build.

2020-10-01

Quick kernel upgrade with kexec

Upgrade kernel of a virtual machine in seconds. Normally kernel upgrade will require a reboot. As reboot will take minutes to complete, service downtime will be more. Here we'll see how upgrade kernel of a VM running Debian-9 in seconds.