Take newest BFS patch from http://ck.kolivas.org/patches/bfs/2.6.30-sched-bfs-203.patch, start from mainline kernel 2.6.30.3, then apply 3 patches:
... and now reconfig, compile, reboot, test, looptar xvfj vanilla/linux-2.6.30.3.tar.bz2
cd linux-2.6.30.3/
patch -p1 < ../ck/2.6.30-sched-bfs-203.patch
bzip2 -dc ../vanilla/patch-2.6.30.3-4.bz2 | patch -p1
# skip 2 patches to kernel/sched.c and kernel/sched_rt.c above
bzip2 -dc ../vanilla/patch-2.6.30.4-5.bz2 | patch -p1
cd ..
mv linux-2.6.30.3 linux-2.6.30.5-ck
ps: don't forget to read BFS FAQ


