Linux Close to Enabling Real-Time "Preempt_rt" Support
The Linux kernel is close to integrating real-time "PREEMPT_RT" support, with potential inclusion in version 6.12 or 6.13, while 6.12 will be this year's Long-Term Support version.
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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 the 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. However, some essential patches for ARM and POWERPC are still pending, and the status of MIPS remains unclear. If the integration is not completed in time for Linux 6.12, it is expected to be finalized with the Linux 6.13 release, which is anticipated to be the first stable version of 2025. Meanwhile, Linux 6.12 is set 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.
- The feature could be included in Linux 6.12 or, if delayed, in 6.13.
- Linux 6.12 will serve as the LTS version for this year.
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