I'll post a compiled deb later on today with Hz set to 300, and the latest BFQ (v2 r1) included. I would have done so sooner, but I've been trying to figure out how to get swap prefetch working with the nuances of Nokia's remapped swap (presumably a basic form of FASS). I also wanted to be sure BFQ was rock-solid stable - so far so good on that front however, I'm contemplating enabling the CGROUPS_BFQIO option (I've had it disabled so far), as although BFS does not use cgroups, other things - such as freezer and ohmd - do. Google comes up a blank when searching for a definitive answer, despite BFS+BFQ being quite common, especially in Android world. There does seem to be a significant improvement over CFQ even with it disabled (as bonnie++ benchmarks testify; the 1.96 version has latency figures too), but it'd be nice to know if the bfqio would push the boundaries further.

Talking of cgroups, did the people having problems with audio issues follow these instructions, thus causing /syspart to not be mounted and disabling the ohmd cgroup module plus associated resource distribution rules?

I originally had done this step, but have now reverted it, as according to Eero Tamminen,

.. and since then, haven't had a single distortion, not even a minor one. So could this be the fix?