Are they accepted upstream? If not, I'd like to see a link to the lkml thread for these.
I only mention this as a historical case that has remained in my memory. Maybe Linus is willing to revisit the issue, I don't follow LKML.
[1] https://en.wikipedia.org/wiki/Con_Kolivas
[2] http://ck-hack.blogspot.com/2015/12/bfs-467-linux-43-ck3.htm...
It'd be interesting to see if that branch exhibit the same behavior and issues.
Moreover, since (several of) the patches seem to rip out a bunch of logic in favor of very simple logic, they would probably be contentious without broad testing and probably a runtime option to configure the behavior.