One of Red Hat’s core partner requirements centers around mixed criticality (MC), where safety and non-safety applications run simultaneously on a single SoC – an interesting challenge for a general-purpose Linux-based operating system, designed to be flexible and portable across hardware architectures. The presentation will cover the various MC architectures that Red Hat supports for freedom from interference (FFI) between QM and ASIL partitions, as well as their pros and cons. It will also dive deeply into the preferred container-based architecture and the tools available to ensure FFI, including a demonstration from an actual deployment. The presentation will show the importance of various isolation mechanisms, and the use of real-time process scheduling for low-latency requirements, concluding with brief coverage of other performance work, including boot time and inter-process communication.