What's Happening?
The upcoming Linux 7.1 release is set to begin the process of phasing out support for Intel 486 CPUs, marking the end of an era for these legacy processors. A patch has been queued into the development branches ahead of the Linux 7.1 merge window, which
will remove the CONFIG_M486SX, CONFIG_M486, and CONFIG_MELAN Kconfig build options. This change is driven by the rarity of i486 CPU usage and the lack of support from Linux distribution vendors. Linus Torvalds, the creator of Linux, has expressed that there is 'zero real reason' to maintain support for these outdated processors, as it diverts development resources. Ingo Molnar, who authored the patch, noted that maintaining support for these 32-bit CPUs requires complex hardware emulation, which poses ongoing maintenance challenges.
Why It's Important?
The removal of i486 CPU support from the Linux kernel signifies a shift in focus towards more modern hardware, allowing developers to streamline the kernel and reduce maintenance burdens. This decision reflects the broader trend in technology to phase out legacy systems that are no longer widely used, freeing up resources for innovation and improvement in current technologies. For users still operating on i486 CPUs, this change means they will need to rely on existing Linux LTS kernel versions, as future updates will not support their hardware. This move could also influence other software developers to reconsider support for outdated systems, potentially accelerating the adoption of newer technologies.
What's Next?
Following the initial removal of the Kconfig options in Linux 7.1, the actual i486 CPU support code is expected to be removed in subsequent kernel series. This will further reduce the maintenance load on kernel developers. Stakeholders, including developers and users of Linux systems, may need to adjust their strategies and systems to accommodate these changes. The broader Linux community will likely continue to focus on optimizing the kernel for modern hardware, potentially leading to further deprecations of outdated technologies in the future.
