TL;DR This post isn't about lrzip at last.
I've ported BFS and all previous -ck patches to 2.6.38.
2.6.38-ck1 can be grabbed here:
Ubuntu packages here:
and BFS for 2.6.38 can be grabbed here:
Apart from slight architectural changes between the kernel versions, and YET ANOTHER mainline rewrite of the CPU offlining code for suspend to ram/disk (which always causes problems with porting BFS since I have to rewrite my own parts of that code), this is the same BFS v0.363 as per the last release.
There is no "autogrouping by SID" in BFS or -ck. I remain unconvinced of any tangible benefit of such an approach for real world usage, and for the potential for problems and inability to apportion CPU when you actually want to.
Please report your experiences, but only if they're meaningful. I don't care how your PC performs if you do make -j 4096 unless you happen to have 4096 CPUs :)
Please enjoy! お楽しみ下さい