After two years of talking about Intel FRED as Flexible Return and Event Delivery for overhauling how transitions are done between privilege levels (CPU rings), the support code was finally in good shape for merging now with the Linux 6.9 kernel.
Intel's next-gen Xeon 'Granite Rapids' CPus get huge boost in L3 cache: up to 480MB of L3 cache, a huge 50% boost in L3 cache over Emerald Rapids CPUs.