Kernel Configs and Its Dependencies

less than 1 minute read

Phicomm N1 Box High CPU Usage Due to IRQ-42

6 minute read

While playing Armbian with Phicomm N1 box, I found kernel thread irq/42-0.200908 have very high cpu usage thus cause the load average to around 2, this is a ...

gdb cheatsheet

1 minute read

breakpoint

What Does Tainted Flags Mean in Oops Messages

2 minute read

[ 81.890105] CPU: 3 PID: 890 Comm: insmod Tainted: G           O      4.19.108-v8+ #1

Install Pi-hole with Docker on Phicomm N1

2 minute read

Install required packages ```bash $ sudo apt install docker.io -y $ sudo apt install docker-compose -y $ sudo apt install lighttpd -y

Markdown Cheatsheet

less than 1 minute read

Preserve white spaces In macOS, you need to press⌥ Opt+Space

Remove Git Commit from History

1 minute read

Occasionally, you may want to remove a commit from github/gitlab, for example, I pushed a commit to switched the jekyll theme from minima to minimal mistakes...

Random Kernel Debugging Tips

3 minute read

All-zero address shown when do cat /proc/modules echo 0 > /proc/sys/kernel/kptr_restrict # or with sysctl sysctl kernel.kptr_restrict=0

Setup Development Environment on Phicomm T1

2 minute read

Basic Setup

Syzkaller: Coverage-guided Kernel Fuzzer

2 minute read

Syzkaller is a coverage-guided fuzzer for Linux kernel, it was mainly developed by Dmitry Vyukov, and with many other developers, it’s under active developme...