Linux Close to Enabling Real-Time "Preempt_rt" Support
The Linux kernel is nearing real-time "PREEMPT_RT" support integration, addressing console issues for potential inclusion in version 6.12, with a fallback to 6.13 if necessary.
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The Linux kernel is nearing the integration of real-time "PREEMPT_RT" support, a feature that has been in development for several years. The final hurdle involves non-blocking console and atomic console support, which is currently being addressed in the linux-next branch for potential inclusion in the upcoming Linux 6.12 release. A recent patch series by Sebastian Andrzej Siewior from Linutronix has made significant progress by including necessary printk components for PREEMPT_RT. This advancement allows for the possibility of enabling PREEMPT_RT on architectures such as X86, ARM64, and Risc-V, with ARM and POWERPC still requiring some essential patches. If successful, PREEMPT_RT could debut in the Linux 6.12 cycle, but if not, it is likely to be finalized in the Linux 6.13 release, expected to be the first stable version of 2025. Meanwhile, Linux 6.12 is anticipated to be this year's Long-Term Support (LTS) kernel version.
- Linux kernel is close to enabling real-time "PREEMPT_RT" support.
- The last major blocker involves non-blocking and atomic console support.
- Recent patches have been submitted to facilitate the integration of PREEMPT_RT.
- If not included in Linux 6.12, PREEMPT_RT is expected to be finalized in Linux 6.13.
- Linux 6.12 is set to be the LTS version for this year.
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