Platform/Kernel

Number Macro Log Level Description Equivalent 0 pr_emerg Emergency System is unusable. KERN_EMERG 1 pr_alert Alert Action must be taken immediately. KERN_ALERT 2 pr_crit Critical Critical conditions. KERN_CRIT 3 pr_err Error Error conditions. KERN_ERR 4 pr_warn Warning Warning conditions. KERN_WARNING 5 pr_notice Notice Normal but significant condition. KERN_NOTICE 6 pr_info Informational Informational messages. KERN_INFO 7 pr_debug Debug Debugging messages. KERN_DEBUG The number corresponds to the log level used by the Linux kernel, with lower numbers indicating higher severity. For example, if the log level is set to 4 (Warning), only messages from pr_emerg to pr_warn will appear in the system logs. Default log level is generally set to 6.

Preparation Install Dependencies sudo pacman -S base-devel xmlto kmod inetutils bc libelf git --needed Downloading source and local setup It is recommended to create a separate build directory for your kernel(s). In this example, the directory kernelbuild will be created in the home directory: mkdir ~/kernelbuild cd ~/kernelbuild Goto kernel.org and download kernel source wget https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.14.5.tar.xz Note: you can verify signature of the downloaded tarball if you want Extract tarball tar -xvJf linux-5.14.5.tar.xz Check ...