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wiki/structured/linux.kernel-options.org
Gabriel Arazas e05076a0c9 Update my notebook and my cards 
It's time to duel and finish the Cloud native course.
2021-06-19 09:53:11 +08:00

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Linux kernel options

  • Gentoo wiki page on kernels
  • Linux also has official documentation on kernel.org and tldp.org
  • the kernel is large today, most of which can be configured to be compiled or not; there is a default configuration when compiling the kernel

  • most of the features you would expect can be included

    • run ELF binaries
    • various filesystem support
    • virtualization support
    • Android drivers
    • debugging options for kernel hacking
    • pseudo-filesystems
    • most drivers for common hardware (e.g., LED, USB, and network devices)
    • special hardware drivers (e.g., Steam controller, Nintendo Wii)
  • most of the options can be configured either to be included inside of the kernel image or as an external module

  • most of the features are available as kernel options

    • CONFIG_HID_GENERIC enables support for generic devices such as mice, keyboards, joysticks
    • you can know what compile options is included from the kernel with /proc/config.gz but only if CONFIG_IKCONFIG_PROC is included
    • CONFIG_HID_BATTERY_STRENGTH enables reporting battery strength
  • you can know what kernel options of the compiled kernel by looking at /proc/config.gz (e.g., gunzip --stdout /proc/config.gz | bat); though, it is only possible if compiled with CONFIG_IKCONFIG_PROC option.