Actually the history of how pluggable schedulers came to be in the kernel is a fascinating one, and one I recall watching unfold in the mid-2000s. There were ou

Actually the history of how pluggable schedulers came to be in the kernel is a fascinating one, and one I recall watching unfold in the mid-2000s. There were out of tree schedulers and a pluggable scheduler implementation put forward by Con Kolivas before Ingo introduced the CFS patch, and a lot of frustration that pluggable scheduler patch sets were rejected up until that point.