The upcoming release of the Linux kernel 7.1, scheduled for mid-June, has recently incorporated changes that allow for the utilization of real-time mode (PREEMPT_RT) on 32-bit ARM processors. This new addition expands upon the existing support for PREEMPT_RT on x86 and x86-64, ARM64, RISC-V, and LoongArch architectures. The acceptance of these changes was confirmed through a commit on the Linux kernel Git repository, which can be found here.
Despite these advancements, there are still pending patches from the rt-linux project that have yet to be integrated into the main kernel. Some of the key features that are still in progress include:
- An entry in sysfs /sys/kernel/realtime to signify when the system is operating in real time.
- Specific fixes for the i915 driver.
- The extension of real-time mode compatibility to the PowerPC architecture.
/Reports, release notes, official announcements.