BFS version 0.512, linux-4.8-ck1, MuQSS for linux-4.8

This is to announce an updated version of BFS for the new stable linux kernel 4.8.

BFS by itself:
4.8-sched-bfs-512.patch

-ck patches with BFS:
4.8-ck1

EDIT: Here's a bugfix post release for the above kernels that I highly recommend you include:
http://ck.kolivas.org/patches/bfs/4.0/4.8/Pending/bfs512-fixes.patch


Following on from the aggressive development towards a new scheduler, this BFS incorporates a number of fixes and performance improvements discovered while working on the Multiple Queue Skiplist Scheduler, MuQSS (pronounced mux) and should be the best performing BFS yet.

Note that this may be the last BFS based -ck release as MuQSS is designed to replace it, being the logical evolution of the same scheduler into a more scalable discrete runqueue design.

For those willing to try it in its current version, an incremental patch can be applied to BFS 512:

bfs512-muqss104.patch

or there is a full patch against 4.8:

4.8-sched-MuQSS_104.patch


Again, MuQSS is still immature code and while I have been running it stably for a few days now, and have spent a lot of time debugging locking issues and stability, it is not intended for production use just yet. Having said that, all testing is most welcome, especially benchmarks and stacktraces if you get any crashes.


I've been asked numerous times why I decided to change the name. There are two major reasons. The first is that it signifies just what a dramatic overhaul to the codebase it is, where it is virtually a new scheduler, even though it uses the same scheduling decision policy as BFS. The second is that I've had many people approach me saying they would like to use BFS for their own production environment but alas the offensive name is a showstopper for them. Additionally I had to choose a name that wasn't being used by anything else which both BFS and brainfuck had been used before.


Enjoy!
お楽しみ下さい
-ck