I'm on the zen kernel which unfortunately no longer maintains their unstable branch so I'll probably have to wait til this is either backported or 2.6.37 goes final.
man, i hate that too. they stopped maintaining their unstable git repository since 2.33 and the patches are just messed up to deal with. all the hunks fail. although i dont know why you are getting such an abysmal performance with bfs. i use bfs with liquorix kernel config plus 1500 hz timer without dynamic ticks, and sched_iso policy for x enabled and it works like a charm. also, with zen-tune profile set to desktop.