diff --git a/_posts/2021-11-06-linux-contribution.md b/_posts/2021-11-06-linux-contribution.md index 2393c52..690a695 100644 --- a/_posts/2021-11-06-linux-contribution.md +++ b/_posts/2021-11-06-linux-contribution.md @@ -17,11 +17,11 @@ qemu-img create disk.img 15G {% endhighlight %} - Start the machine and [install Archlinux](https://wiki.archlinux.org/title/Installation_guide) {% highlight bash %} -qemu-system-x86_64 -cdrom archlinux-2021.11.01-x86_64.iso -boot order=d -drive format=raw,file=disk.img -m 8G -smp cpus=4 +qemu-system-x86_64 -cdrom archlinux-2021.11.01-x86_64.iso -boot order=d -drive format=raw,file=disk.img -m 8G {% endhighlight %} -- Start the machine after installing +- Start the machine after installing (note I forward 2222 to 22 so I can SSH/SCP to the virtual machine. I also set 4 CPUs so I can use threads for faster builds in the VM) {% highlight bash %} -qemu-system-x86_64 -drive format=raw,file=disk.img -m 2G +qemu-system-x86_64 -boot -drive format=raw,file=disk.img -m 8G -smp cpus=4 -net user,hostfwd=tcp::2222-:22 -net nic {% endhighlight %} - Install dependencies: {% highlight bash %} @@ -56,3 +56,33 @@ mkinitcpio -k $RELEASE -s autodetect -g /boot/initramfs-linux-fallback${RELEASE} grub-mkconfig -o /boot/grub/grub.cfg {% endhighlight %} - Reboot and choose the new kernel (might be under "Advanced" in the bootloader) +- Setup your environment for development. Mine consists of setting up tmux so I can have multiple terminals and neovim. +{% highlight bash %} +pacman -S neovim openssh tmux +echo '[[ -z "$TMUX" ]] && exec tmux' >> /etc/profile +# also follow https://github.com/junegunn/vim-plug for Neovim +{% endhighlight %} + +And in the host: +{% highlight bash %} +scp -P 2222 ~/.tmux.conf root@localhost:/root +scp -r -P 2222 ~/.config/nvim root@localhost:/root/.config/ +{% endhighlight %} + +# Debugging Logs +There is a `pr_debug` function used over the code, in order to enable those logs in `dmesg` for a specific module, you can do this: + +{% highlight bash %} +echo 'module ip_set +p' > /sys/kernel/debug/dynamic_debug/control +{% endhighlight %} + +Note that, this works if you have dynamic debug enabled in your `.config`: +{% highlight bash %} +CONFIG_DYNAMIC_DEBUG=y +CONFIG_DYNAMIC_DEBUG_CORE=y +{% endhighlight %} + +You can then look at `dmesg` while running the code to see those logs: +{% highlight bash %} +dmesg +{% endhighlight %}